Finding the Fourth Proportional to 81,043.75, 121,566.17 and 25,639.75
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Solution
The fourth proportional to 81,043.75, 121,566.17 and 25,639.75 is: 38,459.80
Step by Step Solution
- Step 1: Write the proportion equation
81,043.75 : 121,566.17 = 25,639.75 : x - Step 2: Convert to fraction form
81,043.75/121,566.17 = 25,639.75/x - Step 3: Cross multiply
81,043.75x = 121,566.17 × 25,639.75 - Step 4: Simplify right side
81,043.75x = 3,116,926,207.26 - Step 5: Solve for x
x = 3,116,926,207.26/81,043.75 - Step 6: Final answer
x = 38,459.80
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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.