Finding the Fourth Proportional to 81,321.28, 121,951.58 and 27,998.19
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Solution
The fourth proportional to 81,321.28, 121,951.58 and 27,998.19 is: 41,986.84
Step by Step Solution
- Step 1: Write the proportion equation
81,321.28 : 121,951.58 = 27,998.19 : x - Step 2: Convert to fraction form
81,321.28/121,951.58 = 27,998.19/x - Step 3: Cross multiply
81,321.28x = 121,951.58 × 27,998.19 - Step 4: Simplify right side
81,321.28x = 3,414,423,675.05 - Step 5: Solve for x
x = 3,414,423,675.05/81,321.28 - Step 6: Final answer
x = 41,986.84
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Similar ratio
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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.