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Finding the Fourth Proportional to 168.93, 251.79 and 168.66

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Solution

The fourth proportional to 168.93, 251.79 and 168.66 is: 251.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    168.93 : 251.79 = 168.66 : x
  2. Step 2: Convert to fraction form
    168.93/251.79 = 168.66/x
  3. Step 3: Cross multiply
    168.93x = 251.79 × 168.66
  4. Step 4: Simplify right side
    168.93x = 42,466.90
  5. Step 5: Solve for x
    x = 42,466.90/168.93
  6. Step 6: Final answer
    x = 251.39

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.