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Finding the Fourth Proportional to 196.12, 270.62 and 122.44

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Solution

The fourth proportional to 196.12, 270.62 and 122.44 is: 168.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    196.12 : 270.62 = 122.44 : x
  2. Step 2: Convert to fraction form
    196.12/270.62 = 122.44/x
  3. Step 3: Cross multiply
    196.12x = 270.62 × 122.44
  4. Step 4: Simplify right side
    196.12x = 33,134.71
  5. Step 5: Solve for x
    x = 33,134.71/196.12
  6. Step 6: Final answer
    x = 168.95

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.