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Finding the Fourth Proportional to 57,956.60, 86,934.90 and 18,517.70

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Solution

The fourth proportional to 57,956.60, 86,934.90 and 18,517.70 is: 27,776.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    57,956.60 : 86,934.90 = 18,517.70 : x
  2. Step 2: Convert to fraction form
    57,956.60/86,934.90 = 18,517.70/x
  3. Step 3: Cross multiply
    57,956.60x = 86,934.90 × 18,517.70
  4. Step 4: Simplify right side
    57,956.60x = 1,609,834,397.73
  5. Step 5: Solve for x
    x = 1,609,834,397.73/57,956.60
  6. Step 6: Final answer
    x = 27,776.55

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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.