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Finding the Fourth Proportional to 91,930.60, 137,627.10 and 68,660.20

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Solution

The fourth proportional to 91,930.60, 137,627.10 and 68,660.20 is: 102,789.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    91,930.60 : 137,627.10 = 68,660.20 : x
  2. Step 2: Convert to fraction form
    91,930.60/137,627.10 = 68,660.20/x
  3. Step 3: Cross multiply
    91,930.60x = 137,627.10 × 68,660.20
  4. Step 4: Simplify right side
    91,930.60x = 9,449,504,211.42
  5. Step 5: Solve for x
    x = 9,449,504,211.42/91,930.60
  6. Step 6: Final answer
    x = 102,789.54

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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.