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Finding the Fourth Proportional to 132.27, 198.39 and 70.55

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Solution

The fourth proportional to 132.27, 198.39 and 70.55 is: 105.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    132.27 : 198.39 = 70.55 : x
  2. Step 2: Convert to fraction form
    132.27/198.39 = 70.55/x
  3. Step 3: Cross multiply
    132.27x = 198.39 × 70.55
  4. Step 4: Simplify right side
    132.27x = 13,995.90
  5. Step 5: Solve for x
    x = 13,995.90/132.27
  6. Step 6: Final answer
    x = 105.81

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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.