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Finding the Fourth Proportional to 69.75, 104.55 and 33.60

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Solution

The fourth proportional to 69.75, 104.55 and 33.60 is: 50.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    69.75 : 104.55 = 33.60 : x
  2. Step 2: Convert to fraction form
    69.75/104.55 = 33.60/x
  3. Step 3: Cross multiply
    69.75x = 104.55 × 33.60
  4. Step 4: Simplify right side
    69.75x = 3,512.88
  5. Step 5: Solve for x
    x = 3,512.88/69.75
  6. Step 6: Final answer
    x = 50.36

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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.