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Finding the Fourth Proportional to 80.01, 119.90 and 69.89

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Solution

The fourth proportional to 80.01, 119.90 and 69.89 is: 104.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    80.01 : 119.90 = 69.89 : x
  2. Step 2: Convert to fraction form
    80.01/119.90 = 69.89/x
  3. Step 3: Cross multiply
    80.01x = 119.90 × 69.89
  4. Step 4: Simplify right side
    80.01x = 8,378.86
  5. Step 5: Solve for x
    x = 8,378.86/80.01
  6. Step 6: Final answer
    x = 104.72

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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.