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Finding the Fourth Proportional to 67,287.60, 100,931.40 and 42,404.40

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Solution

The fourth proportional to 67,287.60, 100,931.40 and 42,404.40 is: 63,606.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    67,287.60 : 100,931.40 = 42,404.40 : x
  2. Step 2: Convert to fraction form
    67,287.60/100,931.40 = 42,404.40/x
  3. Step 3: Cross multiply
    67,287.60x = 100,931.40 × 42,404.40
  4. Step 4: Simplify right side
    67,287.60x = 4,279,935,458.16
  5. Step 5: Solve for x
    x = 4,279,935,458.16/67,287.60
  6. Step 6: Final answer
    x = 63,606.60

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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.