Finding the Fourth Proportional to 221,715.54, 305,966.97 and 121,113.54
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Solution
The fourth proportional to 221,715.54, 305,966.97 and 121,113.54 is: 167,136.43
Step by Step Solution
- Step 1: Write the proportion equation
221,715.54 : 305,966.97 = 121,113.54 : x - Step 2: Convert to fraction form
221,715.54/305,966.97 = 121,113.54/x - Step 3: Cross multiply
221,715.54x = 305,966.97 × 121,113.54 - Step 4: Simplify right side
221,715.54x = 37,056,742,859.77 - Step 5: Solve for x
x = 37,056,742,859.77/221,715.54 - Step 6: Final answer
x = 167,136.43
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1.5x scale
Why These Related Problems?
These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.