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Finding the Fourth Proportional to 167.39, 251.07 and 80.75

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Solution

The fourth proportional to 167.39, 251.07 and 80.75 is: 121.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    167.39 : 251.07 = 80.75 : x
  2. Step 2: Convert to fraction form
    167.39/251.07 = 80.75/x
  3. Step 3: Cross multiply
    167.39x = 251.07 × 80.75
  4. Step 4: Simplify right side
    167.39x = 20,273.90
  5. Step 5: Solve for x
    x = 20,273.90/167.39
  6. Step 6: Final answer
    x = 121.12

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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.