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Finding the Fourth Proportional to 69.98, 104.98 and 54.94

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Solution

The fourth proportional to 69.98, 104.98 and 54.94 is: 82.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    69.98 : 104.98 = 54.94 : x
  2. Step 2: Convert to fraction form
    69.98/104.98 = 54.94/x
  3. Step 3: Cross multiply
    69.98x = 104.98 × 54.94
  4. Step 4: Simplify right side
    69.98x = 5,767.60
  5. Step 5: Solve for x
    x = 5,767.60/69.98
  6. Step 6: Final answer
    x = 82.42

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.