Use Webform Results in another webform content type
You can programmatically modify the form of Approve Request webform using hook_form_alter() function. In this form you can retrieve the previous webform submission entries and append in the Approve Request form.

You can retrieve previous webform submission using following snippet:

include_once(drupal_get_path('module', 'webform') .'/includes/webform.submissions.inc');
$nid = arg(1); // need to hard-code nid if this is a custom page you can manage dynamically also
$sid = $_GET['sid'];
$submission = webform_get_submission($nid, $sid);