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Finding the Fourth Proportional to 168.46, 231.96 and 145.11

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Solution

The fourth proportional to 168.46, 231.96 and 145.11 is: 199.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    168.46 : 231.96 = 145.11 : x
  2. Step 2: Convert to fraction form
    168.46/231.96 = 145.11/x
  3. Step 3: Cross multiply
    168.46x = 231.96 × 145.11
  4. Step 4: Simplify right side
    168.46x = 33,659.72
  5. Step 5: Solve for x
    x = 33,659.72/168.46
  6. Step 6: Final answer
    x = 199.81

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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.