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Finding the Fourth Proportional to 168.34, 232.09 and 115.79

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Solution

The fourth proportional to 168.34, 232.09 and 115.79 is: 159.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    168.34 : 232.09 = 115.79 : x
  2. Step 2: Convert to fraction form
    168.34/232.09 = 115.79/x
  3. Step 3: Cross multiply
    168.34x = 232.09 × 115.79
  4. Step 4: Simplify right side
    168.34x = 26,873.70
  5. Step 5: Solve for x
    x = 26,873.70/168.34
  6. Step 6: Final answer
    x = 159.64

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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.