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Finding the Fourth Proportional to 261,469.68, 392,152.88 and 71,881.14

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Solution

The fourth proportional to 261,469.68, 392,152.88 and 71,881.14 is: 107,807.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    261,469.68 : 392,152.88 = 71,881.14 : x
  2. Step 2: Convert to fraction form
    261,469.68/392,152.88 = 71,881.14/x
  3. Step 3: Cross multiply
    261,469.68x = 392,152.88 × 71,881.14
  4. Step 4: Simplify right side
    261,469.68x = 28,188,396,068.68
  5. Step 5: Solve for x
    x = 28,188,396,068.68/261,469.68
  6. Step 6: Final answer
    x = 107,807.51

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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.