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Finding the Fourth Proportional to 80.13, 119.70 and 67.98

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Solution

The fourth proportional to 80.13, 119.70 and 67.98 is: 101.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    80.13 : 119.70 = 67.98 : x
  2. Step 2: Convert to fraction form
    80.13/119.70 = 67.98/x
  3. Step 3: Cross multiply
    80.13x = 119.70 × 67.98
  4. Step 4: Simplify right side
    80.13x = 8,137.21
  5. Step 5: Solve for x
    x = 8,137.21/80.13
  6. Step 6: Final answer
    x = 101.55

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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.