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Finding the Fourth Proportional to 167.20, 251.92 and 154.08

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Solution

The fourth proportional to 167.20, 251.92 and 154.08 is: 232.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    167.20 : 251.92 = 154.08 : x
  2. Step 2: Convert to fraction form
    167.20/251.92 = 154.08/x
  3. Step 3: Cross multiply
    167.20x = 251.92 × 154.08
  4. Step 4: Simplify right side
    167.20x = 38,815.83
  5. Step 5: Solve for x
    x = 38,815.83/167.20
  6. Step 6: Final answer
    x = 232.15

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Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.