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Finding the Fourth Proportional to 86.97, 120.03 and 60.73

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Solution

The fourth proportional to 86.97, 120.03 and 60.73 is: 83.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    86.97 : 120.03 = 60.73 : x
  2. Step 2: Convert to fraction form
    86.97/120.03 = 60.73/x
  3. Step 3: Cross multiply
    86.97x = 120.03 × 60.73
  4. Step 4: Simplify right side
    86.97x = 7,289.42
  5. Step 5: Solve for x
    x = 7,289.42/86.97
  6. Step 6: Final answer
    x = 83.82

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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.