Finding the Fourth Proportional to 89,142,471.20, 133,713,706.80 and 81,489,720.80
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Solution
The fourth proportional to 89,142,471.20, 133,713,706.80 and 81,489,720.80 is: 122,234,581.20
Step by Step Solution
- Step 1: Write the proportion equation
89,142,471.20 : 133,713,706.80 = 81,489,720.80 : x - Step 2: Convert to fraction form
89,142,471.20/133,713,706.80 = 81,489,720.80/x - Step 3: Cross multiply
89,142,471.20x = 133,713,706.80 × 81,489,720.80 - Step 4: Simplify right side
89,142,471.20x = 10,896,292,634,265,060 - Step 5: Solve for x
x = 10,896,292,634,265,060/89,142,471.20 - Step 6: Final answer
x = 122,234,581.20
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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.