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Finding the Fourth Proportional to 66,711.60, 100,286.10 and 47,125.80

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Solution

The fourth proportional to 66,711.60, 100,286.10 and 47,125.80 is: 70,843.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,711.60 : 100,286.10 = 47,125.80 : x
  2. Step 2: Convert to fraction form
    66,711.60/100,286.10 = 47,125.80/x
  3. Step 3: Cross multiply
    66,711.60x = 100,286.10 × 47,125.80
  4. Step 4: Simplify right side
    66,711.60x = 4,726,062,691.38
  5. Step 5: Solve for x
    x = 4,726,062,691.38/66,711.60
  6. Step 6: Final answer
    x = 70,843.19

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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.