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Finding the Fourth Proportional to 167.57, 251.45 and 71.38

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Solution

The fourth proportional to 167.57, 251.45 and 71.38 is: 107.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    167.57 : 251.45 = 71.38 : x
  2. Step 2: Convert to fraction form
    167.57/251.45 = 71.38/x
  3. Step 3: Cross multiply
    167.57x = 251.45 × 71.38
  4. Step 4: Simplify right side
    167.57x = 17,946.89
  5. Step 5: Solve for x
    x = 17,946.89/167.57
  6. Step 6: Final answer
    x = 107.10

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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.