Home / 131,471.20-197,091.60-78,824.80

Finding the Fourth Proportional to 131,471.20, 197,091.60 and 78,824.80

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Solution

The fourth proportional to 131,471.20, 197,091.60 and 78,824.80 is: 118,168.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    131,471.20 : 197,091.60 = 78,824.80 : x
  2. Step 2: Convert to fraction form
    131,471.20/197,091.60 = 78,824.80/x
  3. Step 3: Cross multiply
    131,471.20x = 197,091.60 × 78,824.80
  4. Step 4: Simplify right side
    131,471.20x = 15,535,705,951.68
  5. Step 5: Solve for x
    x = 15,535,705,951.68/131,471.20
  6. Step 6: Final answer
    x = 118,168.13

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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.