Finding the Fourth Proportional to 81,720.80, 122,578.76 and 22,560.08
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Solution
The fourth proportional to 81,720.80, 122,578.76 and 22,560.08 is: 33,839.45
Step by Step Solution
- Step 1: Write the proportion equation
81,720.80 : 122,578.76 = 22,560.08 : x - Step 2: Convert to fraction form
81,720.80/122,578.76 = 22,560.08/x - Step 3: Cross multiply
81,720.80x = 122,578.76 × 22,560.08 - Step 4: Simplify right side
81,720.80x = 2,765,386,631.90 - Step 5: Solve for x
x = 2,765,386,631.90/81,720.80 - Step 6: Final answer
x = 33,839.45
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1.5x scale
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.