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Finding the Fourth Proportional to 168.79, 252.89 and 142.93

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Solution

The fourth proportional to 168.79, 252.89 and 142.93 is: 214.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    168.79 : 252.89 = 142.93 : x
  2. Step 2: Convert to fraction form
    168.79/252.89 = 142.93/x
  3. Step 3: Cross multiply
    168.79x = 252.89 × 142.93
  4. Step 4: Simplify right side
    168.79x = 36,145.57
  5. Step 5: Solve for x
    x = 36,145.57/168.79
  6. Step 6: Final answer
    x = 214.15

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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.