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Finding the Fourth Proportional to 168.33, 253.43 and 131.97

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Solution

The fourth proportional to 168.33, 253.43 and 131.97 is: 198.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    168.33 : 253.43 = 131.97 : x
  2. Step 2: Convert to fraction form
    168.33/253.43 = 131.97/x
  3. Step 3: Cross multiply
    168.33x = 253.43 × 131.97
  4. Step 4: Simplify right side
    168.33x = 33,445.16
  5. Step 5: Solve for x
    x = 33,445.16/168.33
  6. Step 6: Final answer
    x = 198.69

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Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.