Home / 68,759.10-103,138.72-18,839.60

Finding the Fourth Proportional to 68,759.10, 103,138.72 and 18,839.60

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Solution

The fourth proportional to 68,759.10, 103,138.72 and 18,839.60 is: 28,259.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    68,759.10 : 103,138.72 = 18,839.60 : x
  2. Step 2: Convert to fraction form
    68,759.10/103,138.72 = 18,839.60/x
  3. Step 3: Cross multiply
    68,759.10x = 103,138.72 × 18,839.60
  4. Step 4: Simplify right side
    68,759.10x = 1,943,092,229.31
  5. Step 5: Solve for x
    x = 1,943,092,229.31/68,759.10
  6. Step 6: Final answer
    x = 28,259.42

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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.