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Finding the Fourth Proportional to 70.87, 98.24 and 69.73

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Solution

The fourth proportional to 70.87, 98.24 and 69.73 is: 96.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    70.87 : 98.24 = 69.73 : x
  2. Step 2: Convert to fraction form
    70.87/98.24 = 69.73/x
  3. Step 3: Cross multiply
    70.87x = 98.24 × 69.73
  4. Step 4: Simplify right side
    70.87x = 6,850.28
  5. Step 5: Solve for x
    x = 6,850.28/70.87
  6. Step 6: Final answer
    x = 96.66

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Why These Related Problems?

These problems maintain the same ratio (1.39) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.