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Finding the Fourth Proportional to 80,793.50, 121,190.25 and 28,188.86

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Solution

The fourth proportional to 80,793.50, 121,190.25 and 28,188.86 is: 42,283.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    80,793.50 : 121,190.25 = 28,188.86 : x
  2. Step 2: Convert to fraction form
    80,793.50/121,190.25 = 28,188.86/x
  3. Step 3: Cross multiply
    80,793.50x = 121,190.25 × 28,188.86
  4. Step 4: Simplify right side
    80,793.50x = 3,416,214,990.62
  5. Step 5: Solve for x
    x = 3,416,214,990.62/80,793.50
  6. Step 6: Final answer
    x = 42,283.29

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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.