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Finding the Fourth Proportional to 218,149.20, 327,126.60 and 99,856.80

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Solution

The fourth proportional to 218,149.20, 327,126.60 and 99,856.80 is: 149,740.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    218,149.20 : 327,126.60 = 99,856.80 : x
  2. Step 2: Convert to fraction form
    218,149.20/327,126.60 = 99,856.80/x
  3. Step 3: Cross multiply
    218,149.20x = 327,126.60 × 99,856.80
  4. Step 4: Simplify right side
    218,149.20x = 32,665,815,470.88
  5. Step 5: Solve for x
    x = 32,665,815,470.88/218,149.20
  6. Step 6: Final answer
    x = 149,740.71

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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.