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Finding the Fourth Proportional to 70,753.62, 97,640.46 and 38,921.70

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Solution

The fourth proportional to 70,753.62, 97,640.46 and 38,921.70 is: 53,712.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    70,753.62 : 97,640.46 = 38,921.70 : x
  2. Step 2: Convert to fraction form
    70,753.62/97,640.46 = 38,921.70/x
  3. Step 3: Cross multiply
    70,753.62x = 97,640.46 × 38,921.70
  4. Step 4: Simplify right side
    70,753.62x = 3,800,332,691.98
  5. Step 5: Solve for x
    x = 3,800,332,691.98/70,753.62
  6. Step 6: Final answer
    x = 53,712.20

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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.