Finding the Fourth Proportional to 90,578,979.56, 124,982,387.18 and 53,420,887.28
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Solution
The fourth proportional to 90,578,979.56, 124,982,387.18 and 53,420,887.28 is: 73,711,031.52
Step by Step Solution
- Step 1: Write the proportion equation
90,578,979.56 : 124,982,387.18 = 53,420,887.28 : x - Step 2: Convert to fraction form
90,578,979.56/124,982,387.18 = 53,420,887.28/x - Step 3: Cross multiply
90,578,979.56x = 124,982,387.18 × 53,420,887.28 - Step 4: Simplify right side
90,578,979.56x = 6,676,670,017,370,976 - Step 5: Solve for x
x = 6,676,670,017,370,976/90,578,979.56 - Step 6: Final answer
x = 73,711,031.52
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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.