Finding the Fourth Proportional to 71,685.13, 107,513.26 and 68,128.53
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Solution
The fourth proportional to 71,685.13, 107,513.26 and 68,128.53 is: 102,179.08
Step by Step Solution
- Step 1: Write the proportion equation
71,685.13 : 107,513.26 = 68,128.53 : x - Step 2: Convert to fraction form
71,685.13/107,513.26 = 68,128.53/x - Step 3: Cross multiply
71,685.13x = 107,513.26 × 68,128.53 - Step 4: Simplify right side
71,685.13x = 7,324,720,359.31 - Step 5: Solve for x
x = 7,324,720,359.31/71,685.13 - Step 6: Final answer
x = 102,179.08
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Why These Related Problems?
These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.