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Finding the Fourth Proportional to 111,306.12, 166,736.52 and 66,908.61

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Solution

The fourth proportional to 111,306.12, 166,736.52 and 66,908.61 is: 100,229.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    111,306.12 : 166,736.52 = 66,908.61 : x
  2. Step 2: Convert to fraction form
    111,306.12/166,736.52 = 66,908.61/x
  3. Step 3: Cross multiply
    111,306.12x = 166,736.52 × 66,908.61
  4. Step 4: Simplify right side
    111,306.12x = 11,156,108,789.44
  5. Step 5: Solve for x
    x = 11,156,108,789.44/111,306.12
  6. Step 6: Final answer
    x = 100,229.07

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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.