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Finding the Fourth Proportional to 168.59, 252.72 and 91.48

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Solution

The fourth proportional to 168.59, 252.72 and 91.48 is: 137.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    168.59 : 252.72 = 91.48 : x
  2. Step 2: Convert to fraction form
    168.59/252.72 = 91.48/x
  3. Step 3: Cross multiply
    168.59x = 252.72 × 91.48
  4. Step 4: Simplify right side
    168.59x = 23,118.83
  5. Step 5: Solve for x
    x = 23,118.83/168.59
  6. Step 6: Final answer
    x = 137.13

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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.