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Finding the Fourth Proportional to 168.29, 252.43 and 72.17

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Solution

The fourth proportional to 168.29, 252.43 and 72.17 is: 108.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    168.29 : 252.43 = 72.17 : x
  2. Step 2: Convert to fraction form
    168.29/252.43 = 72.17/x
  3. Step 3: Cross multiply
    168.29x = 252.43 × 72.17
  4. Step 4: Simplify right side
    168.29x = 18,216.43
  5. Step 5: Solve for x
    x = 18,216.43/168.29
  6. Step 6: Final answer
    x = 108.25

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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.