Finding the Fourth Proportional to 128,732.20, 193,616.70 and 115,253.80
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Solution
The fourth proportional to 128,732.20, 193,616.70 and 115,253.80 is: 173,344.82
Step by Step Solution
- Step 1: Write the proportion equation
128,732.20 : 193,616.70 = 115,253.80 : x - Step 2: Convert to fraction form
128,732.20/193,616.70 = 115,253.80/x - Step 3: Cross multiply
128,732.20x = 193,616.70 × 115,253.80 - Step 4: Simplify right side
128,732.20x = 22,315,060,418.46 - Step 5: Solve for x
x = 22,315,060,418.46/128,732.20 - Step 6: Final answer
x = 173,344.82
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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.