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Finding the Fourth Proportional to 68,919.88, 103,314.16 and 22,139.92

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Solution

The fourth proportional to 68,919.88, 103,314.16 and 22,139.92 is: 33,188.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    68,919.88 : 103,314.16 = 22,139.92 : x
  2. Step 2: Convert to fraction form
    68,919.88/103,314.16 = 22,139.92/x
  3. Step 3: Cross multiply
    68,919.88x = 103,314.16 × 22,139.92
  4. Step 4: Simplify right side
    68,919.88x = 2,287,367,237.27
  5. Step 5: Solve for x
    x = 2,287,367,237.27/68,919.88
  6. Step 6: Final answer
    x = 33,188.79

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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.