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Finding the Fourth Proportional to 196.18, 294.37 and 80.71

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Solution

The fourth proportional to 196.18, 294.37 and 80.71 is: 121.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    196.18 : 294.37 = 80.71 : x
  2. Step 2: Convert to fraction form
    196.18/294.37 = 80.71/x
  3. Step 3: Cross multiply
    196.18x = 294.37 × 80.71
  4. Step 4: Simplify right side
    196.18x = 23,758.20
  5. Step 5: Solve for x
    x = 23,758.20/196.18
  6. Step 6: Final answer
    x = 121.10

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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.