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Finding the Fourth Proportional to 139,691.57, 193,000.20 and 97,438.73

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Solution

The fourth proportional to 139,691.57, 193,000.20 and 97,438.73 is: 134,622.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,691.57 : 193,000.20 = 97,438.73 : x
  2. Step 2: Convert to fraction form
    139,691.57/193,000.20 = 97,438.73/x
  3. Step 3: Cross multiply
    139,691.57x = 193,000.20 × 97,438.73
  4. Step 4: Simplify right side
    139,691.57x = 18,805,694,377.75
  5. Step 5: Solve for x
    x = 18,805,694,377.75/139,691.57
  6. Step 6: Final answer
    x = 134,622.97

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.