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Finding the Fourth Proportional to 71,344.59, 107,008.78 and 18,758.17

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Solution

The fourth proportional to 71,344.59, 107,008.78 and 18,758.17 is: 28,135.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,344.59 : 107,008.78 = 18,758.17 : x
  2. Step 2: Convert to fraction form
    71,344.59/107,008.78 = 18,758.17/x
  3. Step 3: Cross multiply
    71,344.59x = 107,008.78 × 18,758.17
  4. Step 4: Simplify right side
    71,344.59x = 2,007,288,886.73
  5. Step 5: Solve for x
    x = 2,007,288,886.73/71,344.59
  6. Step 6: Final answer
    x = 28,135.12

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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.