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Finding the Fourth Proportional to 80.41, 119.95 and 69.68

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Solution

The fourth proportional to 80.41, 119.95 and 69.68 is: 103.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    80.41 : 119.95 = 69.68 : x
  2. Step 2: Convert to fraction form
    80.41/119.95 = 69.68/x
  3. Step 3: Cross multiply
    80.41x = 119.95 × 69.68
  4. Step 4: Simplify right side
    80.41x = 8,358.12
  5. Step 5: Solve for x
    x = 8,358.12/80.41
  6. Step 6: Final answer
    x = 103.94

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.