Home / 204,213.20-306,392.70-85,920.80

Finding the Fourth Proportional to 204,213.20, 306,392.70 and 85,920.80

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Solution

The fourth proportional to 204,213.20, 306,392.70 and 85,920.80 is: 128,911.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    204,213.20 : 306,392.70 = 85,920.80 : x
  2. Step 2: Convert to fraction form
    204,213.20/306,392.70 = 85,920.80/x
  3. Step 3: Cross multiply
    204,213.20x = 306,392.70 × 85,920.80
  4. Step 4: Simplify right side
    204,213.20x = 26,325,505,898.16
  5. Step 5: Solve for x
    x = 26,325,505,898.16/204,213.20
  6. Step 6: Final answer
    x = 128,911.87

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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.