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Finding the Fourth Proportional to 168.39, 232.16 and 143.78

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Solution

The fourth proportional to 168.39, 232.16 and 143.78 is: 198.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    168.39 : 232.16 = 143.78 : x
  2. Step 2: Convert to fraction form
    168.39/232.16 = 143.78/x
  3. Step 3: Cross multiply
    168.39x = 232.16 × 143.78
  4. Step 4: Simplify right side
    168.39x = 33,378.09
  5. Step 5: Solve for x
    x = 33,378.09/168.39
  6. Step 6: Final answer
    x = 198.22

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.