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Finding the Fourth Proportional to 69,863.87, 104,780.92 and 19,930.56

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Solution

The fourth proportional to 69,863.87, 104,780.92 and 19,930.56 is: 29,891.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    69,863.87 : 104,780.92 = 19,930.56 : x
  2. Step 2: Convert to fraction form
    69,863.87/104,780.92 = 19,930.56/x
  3. Step 3: Cross multiply
    69,863.87x = 104,780.92 × 19,930.56
  4. Step 4: Simplify right side
    69,863.87x = 2,088,341,951.48
  5. Step 5: Solve for x
    x = 2,088,341,951.48/69,863.87
  6. Step 6: Final answer
    x = 29,891.59

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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.