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Finding the Fourth Proportional to 261,737.92, 392,621.46 and 84,231.28

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Solution

The fourth proportional to 261,737.92, 392,621.46 and 84,231.28 is: 126,351.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    261,737.92 : 392,621.46 = 84,231.28 : x
  2. Step 2: Convert to fraction form
    261,737.92/392,621.46 = 84,231.28/x
  3. Step 3: Cross multiply
    261,737.92x = 392,621.46 × 84,231.28
  4. Step 4: Simplify right side
    261,737.92x = 33,071,008,131.27
  5. Step 5: Solve for x
    x = 33,071,008,131.27/261,737.92
  6. Step 6: Final answer
    x = 126,351.61

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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.