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Finding the Fourth Proportional to 168.81, 251.80 and 143.29

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Solution

The fourth proportional to 168.81, 251.80 and 143.29 is: 213.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    168.81 : 251.80 = 143.29 : x
  2. Step 2: Convert to fraction form
    168.81/251.80 = 143.29/x
  3. Step 3: Cross multiply
    168.81x = 251.80 × 143.29
  4. Step 4: Simplify right side
    168.81x = 36,080.42
  5. Step 5: Solve for x
    x = 36,080.42/168.81
  6. Step 6: Final answer
    x = 213.73

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.