Finding the Fourth Proportional to 66,472,699.31, 91,747,630.70 and 38,979,484.91
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Solution
The fourth proportional to 66,472,699.31, 91,747,630.70 and 38,979,484.91 is: 53,800,664.38
Step by Step Solution
- Step 1: Write the proportion equation
66,472,699.31 : 91,747,630.70 = 38,979,484.91 : x - Step 2: Convert to fraction form
66,472,699.31/91,747,630.70 = 38,979,484.91/x - Step 3: Cross multiply
66,472,699.31x = 91,747,630.70 × 38,979,484.91 - Step 4: Simplify right side
66,472,699.31x = 3,576,275,386,235,494 - Step 5: Solve for x
x = 3,576,275,386,235,494/66,472,699.31 - Step 6: Final answer
x = 53,800,664.38
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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.