Finding the Fourth Proportional to 77,047,837.20, 106,325,989.68 and 42,239,780.28
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Solution
The fourth proportional to 77,047,837.20, 106,325,989.68 and 42,239,780.28 is: 58,290,882.72
Step by Step Solution
- Step 1: Write the proportion equation
77,047,837.20 : 106,325,989.68 = 42,239,780.28 : x - Step 2: Convert to fraction form
77,047,837.20/106,325,989.68 = 42,239,780.28/x - Step 3: Cross multiply
77,047,837.20x = 106,325,989.68 × 42,239,780.28 - Step 4: Simplify right side
77,047,837.20x = 4,491,186,442,136,748 - Step 5: Solve for x
x = 4,491,186,442,136,748/77,047,837.20 - Step 6: Final answer
x = 58,290,882.72
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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.