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Finding the Fourth Proportional to 168.80, 254.12 and 115.03

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Solution

The fourth proportional to 168.80, 254.12 and 115.03 is: 173.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    168.80 : 254.12 = 115.03 : x
  2. Step 2: Convert to fraction form
    168.80/254.12 = 115.03/x
  3. Step 3: Cross multiply
    168.80x = 254.12 × 115.03
  4. Step 4: Simplify right side
    168.80x = 29,231.17
  5. Step 5: Solve for x
    x = 29,231.17/168.80
  6. Step 6: Final answer
    x = 173.18

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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.