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Finding the Fourth Proportional to 167.86, 251.82 and 138.62

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Solution

The fourth proportional to 167.86, 251.82 and 138.62 is: 207.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    167.86 : 251.82 = 138.62 : x
  2. Step 2: Convert to fraction form
    167.86/251.82 = 138.62/x
  3. Step 3: Cross multiply
    167.86x = 251.82 × 138.62
  4. Step 4: Simplify right side
    167.86x = 34,906.03
  5. Step 5: Solve for x
    x = 34,906.03/167.86
  6. Step 6: Final answer
    x = 207.95

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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.