Home / 81,515.20-122,272.80-34,122.10

Finding the Fourth Proportional to 81,515.20, 122,272.80 and 34,122.10

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Solution

The fourth proportional to 81,515.20, 122,272.80 and 34,122.10 is: 51,183.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,515.20 : 122,272.80 = 34,122.10 : x
  2. Step 2: Convert to fraction form
    81,515.20/122,272.80 = 34,122.10/x
  3. Step 3: Cross multiply
    81,515.20x = 122,272.80 × 34,122.10
  4. Step 4: Simplify right side
    81,515.20x = 4,172,204,708.88
  5. Step 5: Solve for x
    x = 4,172,204,708.88/81,515.20
  6. Step 6: Final answer
    x = 51,183.15

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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.