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Finding the Fourth Proportional to 69.79, 104.60 and 35.57

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Solution

The fourth proportional to 69.79, 104.60 and 35.57 is: 53.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    69.79 : 104.60 = 35.57 : x
  2. Step 2: Convert to fraction form
    69.79/104.60 = 35.57/x
  3. Step 3: Cross multiply
    69.79x = 104.60 × 35.57
  4. Step 4: Simplify right side
    69.79x = 3,720.62
  5. Step 5: Solve for x
    x = 3,720.62/69.79
  6. Step 6: Final answer
    x = 53.31

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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.