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Finding the Fourth Proportional to 168.26, 232.32 and 121.72

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Solution

The fourth proportional to 168.26, 232.32 and 121.72 is: 168.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    168.26 : 232.32 = 121.72 : x
  2. Step 2: Convert to fraction form
    168.26/232.32 = 121.72/x
  3. Step 3: Cross multiply
    168.26x = 232.32 × 121.72
  4. Step 4: Simplify right side
    168.26x = 28,277.99
  5. Step 5: Solve for x
    x = 28,277.99/168.26
  6. Step 6: Final answer
    x = 168.06

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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.