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Finding the Fourth Proportional to 278,861.80, 418,523.10 and 129,332.20

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Solution

The fourth proportional to 278,861.80, 418,523.10 and 129,332.20 is: 194,105.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    278,861.80 : 418,523.10 = 129,332.20 : x
  2. Step 2: Convert to fraction form
    278,861.80/418,523.10 = 129,332.20/x
  3. Step 3: Cross multiply
    278,861.80x = 418,523.10 × 129,332.20
  4. Step 4: Simplify right side
    278,861.80x = 54,128,513,273.82
  5. Step 5: Solve for x
    x = 54,128,513,273.82/278,861.80
  6. Step 6: Final answer
    x = 194,105.16

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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.