Use CSS Flexbox.
Code:
<html>
<head>
<title>Equal Height Demo</title>
<style>
.container,
.content,
.icon { display: flex; }
.content { position: relative; margin-right: 20px; width: 30%; background: #fcc; }
.content:nth-child(2) { background: #cfc; }
.icon { position: absolute; right: -10px; bottom: -10px; width: 20px; height: 20px; background: #ccf; }
</style>
</head>
<body>
<div class="container">
<div class="content">
<p>Lorem ipsum dolor sit amet, consectetuer adipiscing elit.</p>
<div class="icon"></div>
</div>
<div class="content">
<p>Lorem ipsum dolor sit amet, consectetuer adipiscing elit. Aenean commodo ligula eget dolor. Aenean massa. Cum sociis natoque penatibus et magnis dis parturient montes, nascetur ridiculus mus.</p>
<div class="icon"></div>
</div>
</div>
</body>
</html>