Finding the Fourth Proportional to 159,491,143.20, 239,348,689.20 and 68,679,904.80
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Solution
The fourth proportional to 159,491,143.20, 239,348,689.20 and 68,679,904.80 is: 103,068,075.50
Step by Step Solution
- Step 1: Write the proportion equation
159,491,143.20 : 239,348,689.20 = 68,679,904.80 : x - Step 2: Convert to fraction form
159,491,143.20/239,348,689.20 = 68,679,904.80/x - Step 3: Cross multiply
159,491,143.20x = 239,348,689.20 × 68,679,904.80 - Step 4: Simplify right side
159,491,143.20x = 16,438,445,188,260,786 - Step 5: Solve for x
x = 16,438,445,188,260,786/159,491,143.20 - Step 6: Final answer
x = 103,068,075.50
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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.