Finding the Fourth Proportional to 128,515.17, 177,329.85 and 80,734.68
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Solution
The fourth proportional to 128,515.17, 177,329.85 and 80,734.68 is: 111,400.61
Step by Step Solution
- Step 1: Write the proportion equation
128,515.17 : 177,329.85 = 80,734.68 : x - Step 2: Convert to fraction form
128,515.17/177,329.85 = 80,734.68/x - Step 3: Cross multiply
128,515.17x = 177,329.85 × 80,734.68 - Step 4: Simplify right side
128,515.17x = 14,316,668,694.20 - Step 5: Solve for x
x = 14,316,668,694.20/128,515.17 - Step 6: Final answer
x = 111,400.61
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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.