There are many ways for you to tackle this problem, of which the easiest would probably be to use a table to display your data instead of a layout grid. In the table, you can set a pixel width of the colums. Set the width you desire per column and you're done!
Many other solutions include CSS and SASS for styling ("width" properties and such), this blogpost is a good starting point: https://www.mendix.com/blog/app-styling-basics-where-to-start-with-look-and-feel/
Try making the whole table smaller by setting the following style.
This will make the whole table smaller, then you can scale the columns like 2:2:4:4