Finding the Fourth Proportional to 81,253.12, 121,864.74 and 36,869.20
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Solution
The fourth proportional to 81,253.12, 121,864.74 and 36,869.20 is: 55,297.02
Step by Step Solution
- Step 1: Write the proportion equation
81,253.12 : 121,864.74 = 36,869.20 : x - Step 2: Convert to fraction form
81,253.12/121,864.74 = 36,869.20/x - Step 3: Cross multiply
81,253.12x = 121,864.74 × 36,869.20 - Step 4: Simplify right side
81,253.12x = 4,493,055,472.01 - Step 5: Solve for x
x = 4,493,055,472.01/81,253.12 - Step 6: Final answer
x = 55,297.02
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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.