Finding the Fourth Proportional to 128,972.76, 193,284.17 and 72,785.08
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Solution
The fourth proportional to 128,972.76, 193,284.17 and 72,785.08 is: 109,078.88
Step by Step Solution
- Step 1: Write the proportion equation
128,972.76 : 193,284.17 = 72,785.08 : x - Step 2: Convert to fraction form
128,972.76/193,284.17 = 72,785.08/x - Step 3: Cross multiply
128,972.76x = 193,284.17 × 72,785.08 - Step 4: Simplify right side
128,972.76x = 14,068,204,336.22 - Step 5: Solve for x
x = 14,068,204,336.22/128,972.76 - Step 6: Final answer
x = 109,078.88
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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.