Keep original ratio when updating width/height of multiple elements through properties panel

Keep original ratio when updating width/height of multiple elements through properties panel: In my work I need to use too many images and need to grid them to make them read easylier and look beautiful. Now I chang them size by Shape Properties one by one, beacuse if I change them size by Properties at same time, images only change Hight or Width and borken their aspect ratio.
I want to type the width size, and only specify the width, hight change by auto., and keep their aspect ratio Hight size is same.
Thanks a lot.