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Finding the Fourth Proportional to 132.91, 199.67 and 92.21

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Solution

The fourth proportional to 132.91, 199.67 and 92.21 is: 138.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    132.91 : 199.67 = 92.21 : x
  2. Step 2: Convert to fraction form
    132.91/199.67 = 92.21/x
  3. Step 3: Cross multiply
    132.91x = 199.67 × 92.21
  4. Step 4: Simplify right side
    132.91x = 18,410.11
  5. Step 5: Solve for x
    x = 18,410.11/132.91
  6. Step 6: Final answer
    x = 138.52

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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.