Finding the Fourth Proportional to 86,341.90, 129,343.35 and 76,937.80
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Solution
The fourth proportional to 86,341.90, 129,343.35 and 76,937.80 is: 115,255.66
Step by Step Solution
- Step 1: Write the proportion equation
86,341.90 : 129,343.35 = 76,937.80 : x - Step 2: Convert to fraction form
86,341.90/129,343.35 = 76,937.80/x - Step 3: Cross multiply
86,341.90x = 129,343.35 × 76,937.80 - Step 4: Simplify right side
86,341.90x = 9,951,392,793.63 - Step 5: Solve for x
x = 9,951,392,793.63/86,341.90 - Step 6: Final answer
x = 115,255.66
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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.