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Finding the Fourth Proportional to 71,209.60, 106,891.20 and 40,105.60

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Solution

The fourth proportional to 71,209.60, 106,891.20 and 40,105.60 is: 60,201.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,209.60 : 106,891.20 = 40,105.60 : x
  2. Step 2: Convert to fraction form
    71,209.60/106,891.20 = 40,105.60/x
  3. Step 3: Cross multiply
    71,209.60x = 106,891.20 × 40,105.60
  4. Step 4: Simplify right side
    71,209.60x = 4,286,935,710.72
  5. Step 5: Solve for x
    x = 4,286,935,710.72/71,209.60
  6. Step 6: Final answer
    x = 60,201.65

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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.