Finding the Fourth Proportional to 81,133.62, 121,700.74 and 25,729.62
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Solution
The fourth proportional to 81,133.62, 121,700.74 and 25,729.62 is: 38,594.53
Step by Step Solution
- Step 1: Write the proportion equation
81,133.62 : 121,700.74 = 25,729.62 : x - Step 2: Convert to fraction form
81,133.62/121,700.74 = 25,729.62/x - Step 3: Cross multiply
81,133.62x = 121,700.74 × 25,729.62 - Step 4: Simplify right side
81,133.62x = 3,131,313,793.92 - Step 5: Solve for x
x = 3,131,313,793.92/81,133.62 - Step 6: Final answer
x = 38,594.53
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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.