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Finding the Fourth Proportional to 69,939.61, 104,940.43 and 36,651.76

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Solution

The fourth proportional to 69,939.61, 104,940.43 and 36,651.76 is: 54,993.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    69,939.61 : 104,940.43 = 36,651.76 : x
  2. Step 2: Convert to fraction form
    69,939.61/104,940.43 = 36,651.76/x
  3. Step 3: Cross multiply
    69,939.61x = 104,940.43 × 36,651.76
  4. Step 4: Simplify right side
    69,939.61x = 3,846,251,690.97
  5. Step 5: Solve for x
    x = 3,846,251,690.97/69,939.61
  6. Step 6: Final answer
    x = 54,993.90

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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.