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Finding the Fourth Proportional to 167.90, 251.38 and 126.64

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Solution

The fourth proportional to 167.90, 251.38 and 126.64 is: 189.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    167.90 : 251.38 = 126.64 : x
  2. Step 2: Convert to fraction form
    167.90/251.38 = 126.64/x
  3. Step 3: Cross multiply
    167.90x = 251.38 × 126.64
  4. Step 4: Simplify right side
    167.90x = 31,834.61
  5. Step 5: Solve for x
    x = 31,834.61/167.90
  6. Step 6: Final answer
    x = 189.61

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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.