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Finding the Fourth Proportional to 70,791.23, 97,691.84 and 38,960.15

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Solution

The fourth proportional to 70,791.23, 97,691.84 and 38,960.15 is: 53,764.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    70,791.23 : 97,691.84 = 38,960.15 : x
  2. Step 2: Convert to fraction form
    70,791.23/97,691.84 = 38,960.15/x
  3. Step 3: Cross multiply
    70,791.23x = 97,691.84 × 38,960.15
  4. Step 4: Simplify right side
    70,791.23x = 3,806,088,545.38
  5. Step 5: Solve for x
    x = 3,806,088,545.38/70,791.23
  6. Step 6: Final answer
    x = 53,764.98

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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.