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Finding the Fourth Proportional to 168.71, 231.13 and 162.56

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Solution

The fourth proportional to 168.71, 231.13 and 162.56 is: 222.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    168.71 : 231.13 = 162.56 : x
  2. Step 2: Convert to fraction form
    168.71/231.13 = 162.56/x
  3. Step 3: Cross multiply
    168.71x = 231.13 × 162.56
  4. Step 4: Simplify right side
    168.71x = 37,572.49
  5. Step 5: Solve for x
    x = 37,572.49/168.71
  6. Step 6: Final answer
    x = 222.70

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Why These Related Problems?

These problems maintain the same ratio (1.37) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.