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Finding the Fourth Proportional to 70,279.20, 96,981.17 and 38,446.20

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Solution

The fourth proportional to 70,279.20, 96,981.17 and 38,446.20 is: 53,053.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    70,279.20 : 96,981.17 = 38,446.20 : x
  2. Step 2: Convert to fraction form
    70,279.20/96,981.17 = 38,446.20/x
  3. Step 3: Cross multiply
    70,279.20x = 96,981.17 × 38,446.20
  4. Step 4: Simplify right side
    70,279.20x = 3,728,557,265.82
  5. Step 5: Solve for x
    x = 3,728,557,265.82/70,279.20
  6. Step 6: Final answer
    x = 53,053.50

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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.