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Finding the Fourth Proportional to 40,608.20, 60,863.70 and 20,876.60

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Solution

The fourth proportional to 40,608.20, 60,863.70 and 20,876.60 is: 31,289.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    40,608.20 : 60,863.70 = 20,876.60 : x
  2. Step 2: Convert to fraction form
    40,608.20/60,863.70 = 20,876.60/x
  3. Step 3: Cross multiply
    40,608.20x = 60,863.70 × 20,876.60
  4. Step 4: Simplify right side
    40,608.20x = 1,270,627,119.42
  5. Step 5: Solve for x
    x = 1,270,627,119.42/40,608.20
  6. Step 6: Final answer
    x = 31,289.91

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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.