How can I take the value in one cell and distribute it among other cells?

What I’m trying to do is make a budget sheet that will automatically split and spread whatever value I place into an input cell into various "accounts" that are also within the sheet.

So kinda like this:
Before-

Input 100$
20% account
20% account
25% account
35% account

After –

Input (Space open for new input)
20% account $20
20% account $20
25% account $25
35% account $35