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Finding the Fourth Proportional to 196.38, 294.51 and 80.76

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Solution

The fourth proportional to 196.38, 294.51 and 80.76 is: 121.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    196.38 : 294.51 = 80.76 : x
  2. Step 2: Convert to fraction form
    196.38/294.51 = 80.76/x
  3. Step 3: Cross multiply
    196.38x = 294.51 × 80.76
  4. Step 4: Simplify right side
    196.38x = 23,784.63
  5. Step 5: Solve for x
    x = 23,784.63/196.38
  6. Step 6: Final answer
    x = 121.12

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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.