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Finding the Fourth Proportional to 195.95, 294.10 and 80.47

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Solution

The fourth proportional to 195.95, 294.10 and 80.47 is: 120.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    195.95 : 294.10 = 80.47 : x
  2. Step 2: Convert to fraction form
    195.95/294.10 = 80.47/x
  3. Step 3: Cross multiply
    195.95x = 294.10 × 80.47
  4. Step 4: Simplify right side
    195.95x = 23,665.82
  5. Step 5: Solve for x
    x = 23,665.82/195.95
  6. Step 6: Final answer
    x = 120.78

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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.