Finding the Fourth Proportional to 81,691.13, 112,727.70 and 45,887.11
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Solution
The fourth proportional to 81,691.13, 112,727.70 and 45,887.11 is: 63,320.80
Step by Step Solution
- Step 1: Write the proportion equation
81,691.13 : 112,727.70 = 45,887.11 : x - Step 2: Convert to fraction form
81,691.13/112,727.70 = 45,887.11/x - Step 3: Cross multiply
81,691.13x = 112,727.70 × 45,887.11 - Step 4: Simplify right side
81,691.13x = 5,172,748,088.13 - Step 5: Solve for x
x = 5,172,748,088.13/81,691.13 - Step 6: Final answer
x = 63,320.80
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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.