Sağ üstteki tabloya bir tane class atayın örneğin sagtablo sonra css kısmına şu kodu ekleyebilirsiniz
.sagtablo td {height: 99px !important;}
bu şekilde sağ üstteki tablonun satırlarının yükseliğini ayarlayabilirsiniz
Buraya Tıklayarak Udemyde bulunan ücretsiz bootstrap kursumu inceleyebilirsiniz
Yani kodun bitmiş hali şöyle olacak
<!doctype html>
<html lang="en">
  <head>
    <!-- Required meta tags -->
    <meta charset="utf-8">
    <meta name="viewport" content="width=device-width, initial-scale=1, shrink-to-fit=no">
 
    <!-- Bootstrap CSS -->
    <link rel="stylesheet" href="https://stackpath.bootstrapcdn.com/bootstrap/4.1.3/css/bootstrap.min.css" integrity="sha384-MCw98/SFnGE8fJT3GXwEOngsV7Zt27NXFoaoApmYm81iuXoPkFOJwJ8ERdknLPMO" crossorigin="anonymous">
 <style>.sagtablo td {height: 99px !important;}</style>
    <title>Hello, world!</title>
  </head>
  <body>
<div class="container">
<div class="row">
<div class="col-md-6">
<table class="table">
  <thead>
    <tr>
      <th scope="col">#</th>
      <th scope="col">First</th>
      <th scope="col">Last</th>
      <th scope="col">Handle</th>
    </tr>
  </thead>
  <tbody>
    <tr>
      <th scope="row">1</th>
      <td>Mark</td>
      <td>Otto</td>
      <td><span class="userTag"><span class="userTag"><span class="userTag"><span class="userTag">@mdo<</span></span></span></span>/td>
    </tr>
    <tr>
      <th scope="row">2</th>
      <td>Jacob</td>
      <td>Thornton</td>
      <td><span class="userTag"><span class="userTag"><span class="userTag"><span class="userTag">@fat<</span></span></span></span>/td>
    </tr>
    <tr>
      <th scope="row">3</th>
      <td>Larry</td>
      <td>the Bird</td>
      <td><span class="userTag"><span class="userTag"><span class="userTag"><span class="userTag"><span class="userTag"><span class="userTag">@twitter<</span></span></span></span></span></span>/td>
    </tr>    <tr>
      <th scope="row">4</th>
      <td>Larry</td>
      <td>the Bird</td>
      <td><span class="userTag"><span class="userTag"><span class="userTag"><span class="userTag"><span class="userTag"><span class="userTag">@twitter<</span></span></span></span></span></span>/td>
    </tr>    <tr>
      <th scope="row">5</th>
      <td>Larry</td>
      <td>the Bird</td>
      <td><span class="userTag"><span class="userTag"><span class="userTag"><span class="userTag"><span class="userTag"><span class="userTag">@twitter<</span></span></span></span></span></span>/td>
    </tr>
  </tbody>
</table>
</div><div class="col-md-6">
<table class="table sagtablo">
  <thead>
    <tr>
      <th scope="col">#</th>
      <th scope="col">Fssssirst</th>
      <th scope="col">Last</th>
      <th scope="col">Handle</th>
    </tr>
  </thead>
  <tbody>
    <tr>
      <th scope="row">1</th>
      <td>Mark</td>
      <td>Otto</td>
      <td><span class="userTag"><span class="userTag"><span class="userTag"><span class="userTag">@mdo<</span></span></span></span>/td>
    </tr>
    <tr>
      <th scope="row">2</th>
      <td>Jacob</td>
      <td>Thornton</td>
      <td><span class="userTag"><span class="userTag"><span class="userTag"><span class="userTag">@fat<</span></span></span></span>/td>
    </tr>
    <tr>
      <th scope="row">3</th>
      <td>Larry</td>
      <td>the Bird</td>
      <td><span class="userTag"><span class="userTag"><span class="userTag"><span class="userTag"><span class="userTag"><span class="userTag">@twitter<</span></span></span></span></span></span>/td>
    </tr>
  </tbody>
</table>
</div><div class="col-md-6">
<table class="table">
  <thead>
    <tr>
      <th scope="col">#</th>
      <th scope="col">First</th>
      <th scope="col">Last</th>
      <th scope="col">Handle</th>
    </tr>
  </thead>
  <tbody>
    <tr>
      <th scope="row">1</th>
      <td>Mark</td>
      <td>Otto</td>
      <td><span class="userTag"><span class="userTag"><span class="userTag"><span class="userTag">@mdo<</span></span></span></span>/td>
    </tr>
    <tr>
      <th scope="row">2</th>
      <td>Jacob</td>
      <td>Thornton</td>
      <td><span class="userTag"><span class="userTag"><span class="userTag"><span class="userTag">@fat<</span></span></span></span>/td>
    </tr>
    <tr>
      <th scope="row">3</th>
      <td>Larry</td>
      <td>the Bird</td>
      <td><span class="userTag"><span class="userTag"><span class="userTag"><span class="userTag"><span class="userTag"><span class="userTag">@twitter<</span></span></span></span></span></span>/td>
    </tr>
  </tbody>
</table>
</div><div class="col-md-6">
<table class="table">
  <thead>
    <tr>
      <th scope="col">#</th>
      <th scope="col">First</th>
      <th scope="col">Last</th>
      <th scope="col">Handle</th>
    </tr>
  </thead>
  <tbody>
    <tr>
      <th scope="row">1</th>
      <td>Mark</td>
      <td>Otto</td>
      <td><span class="userTag"><span class="userTag"><span class="userTag"><span class="userTag">@mdo<</span></span></span></span>/td>
    </tr>
    <tr>
      <th scope="row">2</th>
      <td>Jacob</td>
      <td>Thornton</td>
      <td><span class="userTag"><span class="userTag"><span class="userTag"><span class="userTag">@fat<</span></span></span></span>/td>
    </tr>
    <tr>
      <th scope="row">3</th>
      <td>Larry</td>
      <td>the Bird</td>
      <td><span class="userTag"><span class="userTag"><span class="userTag"><span class="userTag"><span class="userTag"><span class="userTag">@twitter<</span></span></span></span></span></span>/td>
    </tr>
  </tbody>
</table>
</div>
</div>
</div>
    <!-- Optional JavaScript -->
    <!-- jQuery first, then Popper.js, then Bootstrap JS -->
    <script src="https://code.jquery.com/jquery-3.3.1.slim.min.js" integrity="sha384-q8i/X+965DzO0rT7abK41JStQIAqVgRVzpbzo5smXKp4YfRvH+8abtTE1Pi6jizo" crossorigin="anonymous"></script>
    <script src="https://cdnjs.cloudflare.com/ajax/libs/popper.js/1.14.3/umd/popper.min.js" integrity="sha384-ZMP7rVo3mIykV+2+9J3UJ46jBk0WLaUAdn689aCwoqbBJiSnjAK/l8WvCWPIPm49" crossorigin="anonymous"></script>
    <script src="https://stackpath.bootstrapcdn.com/bootstrap/4.1.3/js/bootstrap.min.js" integrity="sha384-ChfqqxuZUCnJSK3+MXmPNIyE6ZbWh2IMqE241rYiqJxyMiZ6OW/JmZQ5stwEULTy" crossorigin="anonymous"></script>
  </body>
</html>