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Finding the Fourth Proportional to 83,995.60, 125,878.20 and 68,443.60

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Solution

The fourth proportional to 83,995.60, 125,878.20 and 68,443.60 is: 102,571.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    83,995.60 : 125,878.20 = 68,443.60 : x
  2. Step 2: Convert to fraction form
    83,995.60/125,878.20 = 68,443.60/x
  3. Step 3: Cross multiply
    83,995.60x = 125,878.20 × 68,443.60
  4. Step 4: Simplify right side
    83,995.60x = 8,615,557,169.52
  5. Step 5: Solve for x
    x = 8,615,557,169.52/83,995.60
  6. Step 6: Final answer
    x = 102,571.53

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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.