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Finding the Fourth Proportional to 261,697.20, 392,545.80 and 135,337.20

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Solution

The fourth proportional to 261,697.20, 392,545.80 and 135,337.20 is: 203,005.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    261,697.20 : 392,545.80 = 135,337.20 : x
  2. Step 2: Convert to fraction form
    261,697.20/392,545.80 = 135,337.20/x
  3. Step 3: Cross multiply
    261,697.20x = 392,545.80 × 135,337.20
  4. Step 4: Simplify right side
    261,697.20x = 53,126,049,443.76
  5. Step 5: Solve for x
    x = 53,126,049,443.76/261,697.20
  6. Step 6: Final answer
    x = 203,005.80

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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.