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Finding the Fourth Proportional to 69.60, 104.46 and 62.88

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Solution

The fourth proportional to 69.60, 104.46 and 62.88 is: 94.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    69.60 : 104.46 = 62.88 : x
  2. Step 2: Convert to fraction form
    69.60/104.46 = 62.88/x
  3. Step 3: Cross multiply
    69.60x = 104.46 × 62.88
  4. Step 4: Simplify right side
    69.60x = 6,568.44
  5. Step 5: Solve for x
    x = 6,568.44/69.60
  6. Step 6: Final answer
    x = 94.37

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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.