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Finding the Fourth Proportional to 168.22, 232.12 and 99.22

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Solution

The fourth proportional to 168.22, 232.12 and 99.22 is: 136.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    168.22 : 232.12 = 99.22 : x
  2. Step 2: Convert to fraction form
    168.22/232.12 = 99.22/x
  3. Step 3: Cross multiply
    168.22x = 232.12 × 99.22
  4. Step 4: Simplify right side
    168.22x = 23,030.95
  5. Step 5: Solve for x
    x = 23,030.95/168.22
  6. Step 6: Final answer
    x = 136.91

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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.