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Finding the Fourth Proportional to 168.15, 252.09 and 52.52

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Solution

The fourth proportional to 168.15, 252.09 and 52.52 is: 78.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    168.15 : 252.09 = 52.52 : x
  2. Step 2: Convert to fraction form
    168.15/252.09 = 52.52/x
  3. Step 3: Cross multiply
    168.15x = 252.09 × 52.52
  4. Step 4: Simplify right side
    168.15x = 13,240.49
  5. Step 5: Solve for x
    x = 13,240.49/168.15
  6. Step 6: Final answer
    x = 78.74

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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.