Finding the Fourth Proportional to 81,138,346.24, 121,721,691.12 and 35,698,959.76
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Solution
The fourth proportional to 81,138,346.24, 121,721,691.12 and 35,698,959.76 is: 53,554,674.88
Step by Step Solution
- Step 1: Write the proportion equation
81,138,346.24 : 121,721,691.12 = 35,698,959.76 : x - Step 2: Convert to fraction form
81,138,346.24/121,721,691.12 = 35,698,959.76/x - Step 3: Cross multiply
81,138,346.24x = 121,721,691.12 × 35,698,959.76 - Step 4: Simplify right side
81,138,346.24x = 4,345,337,753,212,029 - Step 5: Solve for x
x = 4,345,337,753,212,029/81,138,346.24 - Step 6: Final answer
x = 53,554,674.88
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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.