Best way to represent given data (opinion)

I have four column vectors representing forces: P(pressure), B(bending), T(tension), I(interaction). Each row of these vectors represents the force values for a particular point - meaning P(i), T(i), B(i), I(i) are force values at point i. Here, pressure is balanced by the remaining three. I want to plot this data in a graph which will show what proportion of P is balanced by each of the other three forces. Eg,

 P(i) = 10; B(i) = 1; T(i) = 2; I(i) = 5;

Then the graph should be able to convey: at point 'i', 10% of pressure is balanced by bending, 20% by tension, and 50% by interaction.

What is the best way to plot this information?

[dpb]

Sounds like you might try stacked bar for starters...