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Finding the Fourth Proportional to 196.14, 294.18 and 80.64

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Solution

The fourth proportional to 196.14, 294.18 and 80.64 is: 120.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    196.14 : 294.18 = 80.64 : x
  2. Step 2: Convert to fraction form
    196.14/294.18 = 80.64/x
  3. Step 3: Cross multiply
    196.14x = 294.18 × 80.64
  4. Step 4: Simplify right side
    196.14x = 23,722.68
  5. Step 5: Solve for x
    x = 23,722.68/196.14
  6. Step 6: Final answer
    x = 120.95

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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.