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Finding the Fourth Proportional to 69,980.95, 104,939.83 and 20,049.61

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Solution

The fourth proportional to 69,980.95, 104,939.83 and 20,049.61 is: 30,065.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    69,980.95 : 104,939.83 = 20,049.61 : x
  2. Step 2: Convert to fraction form
    69,980.95/104,939.83 = 20,049.61/x
  3. Step 3: Cross multiply
    69,980.95x = 104,939.83 × 20,049.61
  4. Step 4: Simplify right side
    69,980.95x = 2,104,002,664.97
  5. Step 5: Solve for x
    x = 2,104,002,664.97/69,980.95
  6. Step 6: Final answer
    x = 30,065.36

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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.