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Finding the Fourth Proportional to 69,806.88, 104,716.80 and 28,257.12

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Solution

The fourth proportional to 69,806.88, 104,716.80 and 28,257.12 is: 42,388.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    69,806.88 : 104,716.80 = 28,257.12 : x
  2. Step 2: Convert to fraction form
    69,806.88/104,716.80 = 28,257.12/x
  3. Step 3: Cross multiply
    69,806.88x = 104,716.80 × 28,257.12
  4. Step 4: Simplify right side
    69,806.88x = 2,958,995,183.62
  5. Step 5: Solve for x
    x = 2,958,995,183.62/69,806.88
  6. Step 6: Final answer
    x = 42,388.30

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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.