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Finding the Fourth Proportional to 80.03, 110.21 and 69.65

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Solution

The fourth proportional to 80.03, 110.21 and 69.65 is: 95.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    80.03 : 110.21 = 69.65 : x
  2. Step 2: Convert to fraction form
    80.03/110.21 = 69.65/x
  3. Step 3: Cross multiply
    80.03x = 110.21 × 69.65
  4. Step 4: Simplify right side
    80.03x = 7,675.23
  5. Step 5: Solve for x
    x = 7,675.23/80.03
  6. Step 6: Final answer
    x = 95.91

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.