Portfolio QuickView popup column width can be adjusted from the child theme. You can add the following PHP code on your child theme functions.php file to customize it. By default it 50% 50% for the image and content.
add_filter( 'wpb_fp_quick_view_img_column', function(){ return 'wpbfpcol-lg-8'; } );
add_filter( 'wpb_fp_quick_view_content_column', function(){ return 'wpbfpcol-lg-4'; } );