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Finding the Fourth Proportional to 83,891.70, 125,840.43 and 28,480.50

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Solution

The fourth proportional to 83,891.70, 125,840.43 and 28,480.50 is: 42,721.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    83,891.70 : 125,840.43 = 28,480.50 : x
  2. Step 2: Convert to fraction form
    83,891.70/125,840.43 = 28,480.50/x
  3. Step 3: Cross multiply
    83,891.70x = 125,840.43 × 28,480.50
  4. Step 4: Simplify right side
    83,891.70x = 3,583,998,366.62
  5. Step 5: Solve for x
    x = 3,583,998,366.62/83,891.70
  6. Step 6: Final answer
    x = 42,721.73

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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.