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Finding the Fourth Proportional to 168.11, 231.77 and 108.99

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Solution

The fourth proportional to 168.11, 231.77 and 108.99 is: 150.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    168.11 : 231.77 = 108.99 : x
  2. Step 2: Convert to fraction form
    168.11/231.77 = 108.99/x
  3. Step 3: Cross multiply
    168.11x = 231.77 × 108.99
  4. Step 4: Simplify right side
    168.11x = 25,260.61
  5. Step 5: Solve for x
    x = 25,260.61/168.11
  6. Step 6: Final answer
    x = 150.27

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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.