Finding the Fourth Proportional to 81,140.18, 121,414.23 and 47,876.18
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Solution
The fourth proportional to 81,140.18, 121,414.23 and 47,876.18 is: 71,639.59
Step by Step Solution
- Step 1: Write the proportion equation
81,140.18 : 121,414.23 = 47,876.18 : x - Step 2: Convert to fraction form
81,140.18/121,414.23 = 47,876.18/x - Step 3: Cross multiply
81,140.18x = 121,414.23 × 47,876.18 - Step 4: Simplify right side
81,140.18x = 5,812,849,530.04 - Step 5: Solve for x
x = 5,812,849,530.04/81,140.18 - Step 6: Final answer
x = 71,639.59
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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.