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Finding the Fourth Proportional to 118.85, 163.99 and 69.73

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Solution

The fourth proportional to 118.85, 163.99 and 69.73 is: 96.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    118.85 : 163.99 = 69.73 : x
  2. Step 2: Convert to fraction form
    118.85/163.99 = 69.73/x
  3. Step 3: Cross multiply
    118.85x = 163.99 × 69.73
  4. Step 4: Simplify right side
    118.85x = 11,435.02
  5. Step 5: Solve for x
    x = 11,435.02/118.85
  6. Step 6: Final answer
    x = 96.21

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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.