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Finding the Fourth Proportional to 80,856.70, 111,582.50 and 48,591.90

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Solution

The fourth proportional to 80,856.70, 111,582.50 and 48,591.90 is: 67,056.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    80,856.70 : 111,582.50 = 48,591.90 : x
  2. Step 2: Convert to fraction form
    80,856.70/111,582.50 = 48,591.90/x
  3. Step 3: Cross multiply
    80,856.70x = 111,582.50 × 48,591.90
  4. Step 4: Simplify right side
    80,856.70x = 5,422,005,438.79
  5. Step 5: Solve for x
    x = 5,422,005,438.79/80,856.70
  6. Step 6: Final answer
    x = 67,056.97

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.