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Finding the Fourth Proportional to 69,081.40, 103,676.78 and 26,981.65

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Solution

The fourth proportional to 69,081.40, 103,676.78 and 26,981.65 is: 40,493.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    69,081.40 : 103,676.78 = 26,981.65 : x
  2. Step 2: Convert to fraction form
    69,081.40/103,676.78 = 26,981.65/x
  3. Step 3: Cross multiply
    69,081.40x = 103,676.78 × 26,981.65
  4. Step 4: Simplify right side
    69,081.40x = 2,797,370,591.09
  5. Step 5: Solve for x
    x = 2,797,370,591.09/69,081.40
  6. Step 6: Final answer
    x = 40,493.83

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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.