Finding the Fourth Proportional to 86,757.68, 129,888.60 and 81,246.48
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Solution
The fourth proportional to 86,757.68, 129,888.60 and 81,246.48 is: 121,637.55
Step by Step Solution
- Step 1: Write the proportion equation
86,757.68 : 129,888.60 = 81,246.48 : x - Step 2: Convert to fraction form
86,757.68/129,888.60 = 81,246.48/x - Step 3: Cross multiply
86,757.68x = 129,888.60 × 81,246.48 - Step 4: Simplify right side
86,757.68x = 10,552,991,542.13 - Step 5: Solve for x
x = 10,552,991,542.13/86,757.68 - Step 6: Final answer
x = 121,637.55
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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.