Finding the Fourth Proportional to 81,425.92, 121,931.52 and 53,639.68
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Solution
The fourth proportional to 81,425.92, 121,931.52 and 53,639.68 is: 80,322.92
Step by Step Solution
- Step 1: Write the proportion equation
81,425.92 : 121,931.52 = 53,639.68 : x - Step 2: Convert to fraction form
81,425.92/121,931.52 = 53,639.68/x - Step 3: Cross multiply
81,425.92x = 121,931.52 × 53,639.68 - Step 4: Simplify right side
81,425.92x = 6,540,367,714.71 - Step 5: Solve for x
x = 6,540,367,714.71/81,425.92 - Step 6: Final answer
x = 80,322.92
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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.