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Finding the Fourth Proportional to 80.41, 111 and 62.97

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Solution

The fourth proportional to 80.41, 111 and 62.97 is: 86.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    80.41 : 111 = 62.97 : x
  2. Step 2: Convert to fraction form
    80.41/111 = 62.97/x
  3. Step 3: Cross multiply
    80.41x = 111 × 62.97
  4. Step 4: Simplify right side
    80.41x = 6,989.67
  5. Step 5: Solve for x
    x = 6,989.67/80.41
  6. Step 6: Final answer
    x = 86.93

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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.