Finding the Fourth Proportional to 81,319.13, 121,948.72 and 27,995.92
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Solution
The fourth proportional to 81,319.13, 121,948.72 and 27,995.92 is: 41,983.56
Step by Step Solution
- Step 1: Write the proportion equation
81,319.13 : 121,948.72 = 27,995.92 : x - Step 2: Convert to fraction form
81,319.13/121,948.72 = 27,995.92/x - Step 3: Cross multiply
81,319.13x = 121,948.72 × 27,995.92 - Step 4: Simplify right side
81,319.13x = 3,414,066,609.22 - Step 5: Solve for x
x = 3,414,066,609.22/81,319.13 - Step 6: Final answer
x = 41,983.56
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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.