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Finding the Fourth Proportional to 168.12, 231.66 and 161.73

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Solution

The fourth proportional to 168.12, 231.66 and 161.73 is: 222.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    168.12 : 231.66 = 161.73 : x
  2. Step 2: Convert to fraction form
    168.12/231.66 = 161.73/x
  3. Step 3: Cross multiply
    168.12x = 231.66 × 161.73
  4. Step 4: Simplify right side
    168.12x = 37,466.37
  5. Step 5: Solve for x
    x = 37,466.37/168.12
  6. Step 6: Final answer
    x = 222.85

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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.