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Finding the Fourth Proportional to 196.33, 294.40 and 80.68

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Solution

The fourth proportional to 196.33, 294.40 and 80.68 is: 120.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    196.33 : 294.40 = 80.68 : x
  2. Step 2: Convert to fraction form
    196.33/294.40 = 80.68/x
  3. Step 3: Cross multiply
    196.33x = 294.40 × 80.68
  4. Step 4: Simplify right side
    196.33x = 23,752.11
  5. Step 5: Solve for x
    x = 23,752.11/196.33
  6. Step 6: Final answer
    x = 120.98

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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.