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Finding the Fourth Proportional to 196.91, 295.49 and 81.32

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Solution

The fourth proportional to 196.91, 295.49 and 81.32 is: 122.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    196.91 : 295.49 = 81.32 : x
  2. Step 2: Convert to fraction form
    196.91/295.49 = 81.32/x
  3. Step 3: Cross multiply
    196.91x = 295.49 × 81.32
  4. Step 4: Simplify right side
    196.91x = 24,029.58
  5. Step 5: Solve for x
    x = 24,029.58/196.91
  6. Step 6: Final answer
    x = 122.04

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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.