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Finding the Fourth Proportional to 168.97, 254.36 and 130.66

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Solution

The fourth proportional to 168.97, 254.36 and 130.66 is: 196.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    168.97 : 254.36 = 130.66 : x
  2. Step 2: Convert to fraction form
    168.97/254.36 = 130.66/x
  3. Step 3: Cross multiply
    168.97x = 254.36 × 130.66
  4. Step 4: Simplify right side
    168.97x = 33,234.68
  5. Step 5: Solve for x
    x = 33,234.68/168.97
  6. Step 6: Final answer
    x = 196.69

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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.