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Finding the Fourth Proportional to 168, 252.08 and 92

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Solution

The fourth proportional to 168, 252.08 and 92 is: 138.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    168 : 252.08 = 92 : x
  2. Step 2: Convert to fraction form
    168/252.08 = 92/x
  3. Step 3: Cross multiply
    168x = 252.08 × 92
  4. Step 4: Simplify right side
    168x = 23,191.36
  5. Step 5: Solve for x
    x = 23,191.36/168
  6. Step 6: Final answer
    x = 138.04

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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.