Home / 149,219.20-205,915.78-81,234.43

Finding the Fourth Proportional to 149,219.20, 205,915.78 and 81,234.43

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Solution

The fourth proportional to 149,219.20, 205,915.78 and 81,234.43 is: 112,099.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    149,219.20 : 205,915.78 = 81,234.43 : x
  2. Step 2: Convert to fraction form
    149,219.20/205,915.78 = 81,234.43/x
  3. Step 3: Cross multiply
    149,219.20x = 205,915.78 × 81,234.43
  4. Step 4: Simplify right side
    149,219.20x = 16,727,451,016.31
  5. Step 5: Solve for x
    x = 16,727,451,016.31/149,219.20
  6. Step 6: Final answer
    x = 112,099.86

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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.