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Finding the Fourth Proportional to 168.30, 252.09 and 135.90

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Solution

The fourth proportional to 168.30, 252.09 and 135.90 is: 203.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    168.30 : 252.09 = 135.90 : x
  2. Step 2: Convert to fraction form
    168.30/252.09 = 135.90/x
  3. Step 3: Cross multiply
    168.30x = 252.09 × 135.90
  4. Step 4: Simplify right side
    168.30x = 34,259.03
  5. Step 5: Solve for x
    x = 34,259.03/168.30
  6. Step 6: Final answer
    x = 203.56

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.