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Finding the Fourth Proportional to 168.10, 231.83 and 109.98

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Solution

The fourth proportional to 168.10, 231.83 and 109.98 is: 151.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    168.10 : 231.83 = 109.98 : x
  2. Step 2: Convert to fraction form
    168.10/231.83 = 109.98/x
  3. Step 3: Cross multiply
    168.10x = 231.83 × 109.98
  4. Step 4: Simplify right side
    168.10x = 25,496.53
  5. Step 5: Solve for x
    x = 25,496.53/168.10
  6. Step 6: Final answer
    x = 151.68

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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.