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Finding the Fourth Proportional to 83,928.80, 125,893.20 and 28,524.80

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Solution

The fourth proportional to 83,928.80, 125,893.20 and 28,524.80 is: 42,787.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    83,928.80 : 125,893.20 = 28,524.80 : x
  2. Step 2: Convert to fraction form
    83,928.80/125,893.20 = 28,524.80/x
  3. Step 3: Cross multiply
    83,928.80x = 125,893.20 × 28,524.80
  4. Step 4: Simplify right side
    83,928.80x = 3,591,078,351.36
  5. Step 5: Solve for x
    x = 3,591,078,351.36/83,928.80
  6. Step 6: Final answer
    x = 42,787.20

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1.5x scale

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.