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Finding the Fourth Proportional to 69,078.11, 103,481.57 and 35,819.91

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Solution

The fourth proportional to 69,078.11, 103,481.57 and 35,819.91 is: 53,659.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    69,078.11 : 103,481.57 = 35,819.91 : x
  2. Step 2: Convert to fraction form
    69,078.11/103,481.57 = 35,819.91/x
  3. Step 3: Cross multiply
    69,078.11x = 103,481.57 × 35,819.91
  4. Step 4: Simplify right side
    69,078.11x = 3,706,700,344.96
  5. Step 5: Solve for x
    x = 3,706,700,344.96/69,078.11
  6. Step 6: Final answer
    x = 53,659.55

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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.