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Finding the Fourth Proportional to 111,449.56, 167,217 and 67,108

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Solution

The fourth proportional to 111,449.56, 167,217 and 67,108 is: 100,687.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    111,449.56 : 167,217 = 67,108 : x
  2. Step 2: Convert to fraction form
    111,449.56/167,217 = 67,108/x
  3. Step 3: Cross multiply
    111,449.56x = 167,217 × 67,108
  4. Step 4: Simplify right side
    111,449.56x = 11,221,598,436
  5. Step 5: Solve for x
    x = 11,221,598,436/111,449.56
  6. Step 6: Final answer
    x = 100,687.69

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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.