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Finding the Fourth Proportional to 169.88, 254.41 and 129.38

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Solution

The fourth proportional to 169.88, 254.41 and 129.38 is: 193.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    169.88 : 254.41 = 129.38 : x
  2. Step 2: Convert to fraction form
    169.88/254.41 = 129.38/x
  3. Step 3: Cross multiply
    169.88x = 254.41 × 129.38
  4. Step 4: Simplify right side
    169.88x = 32,913.97
  5. Step 5: Solve for x
    x = 32,913.97/169.88
  6. Step 6: Final answer
    x = 193.75

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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.