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Finding the Fourth Proportional to 69,939.53, 104,910.30 and 20,019.66

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Solution

The fourth proportional to 69,939.53, 104,910.30 and 20,019.66 is: 30,029.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    69,939.53 : 104,910.30 = 20,019.66 : x
  2. Step 2: Convert to fraction form
    69,939.53/104,910.30 = 20,019.66/x
  3. Step 3: Cross multiply
    69,939.53x = 104,910.30 × 20,019.66
  4. Step 4: Simplify right side
    69,939.53x = 2,100,268,536.50
  5. Step 5: Solve for x
    x = 2,100,268,536.50/69,939.53
  6. Step 6: Final answer
    x = 30,029.78

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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.