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Finding the Fourth Proportional to 132.92, 199.26 and 68.78

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Solution

The fourth proportional to 132.92, 199.26 and 68.78 is: 103.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    132.92 : 199.26 = 68.78 : x
  2. Step 2: Convert to fraction form
    132.92/199.26 = 68.78/x
  3. Step 3: Cross multiply
    132.92x = 199.26 × 68.78
  4. Step 4: Simplify right side
    132.92x = 13,705.10
  5. Step 5: Solve for x
    x = 13,705.10/132.92
  6. Step 6: Final answer
    x = 103.11

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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.