Home / 81,439.10-122,115.45-28,850.30

Finding the Fourth Proportional to 81,439.10, 122,115.45 and 28,850.30

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Solution

The fourth proportional to 81,439.10, 122,115.45 and 28,850.30 is: 43,260.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,439.10 : 122,115.45 = 28,850.30 : x
  2. Step 2: Convert to fraction form
    81,439.10/122,115.45 = 28,850.30/x
  3. Step 3: Cross multiply
    81,439.10x = 122,115.45 × 28,850.30
  4. Step 4: Simplify right side
    81,439.10x = 3,523,067,367.14
  5. Step 5: Solve for x
    x = 3,523,067,367.14/81,439.10
  6. Step 6: Final answer
    x = 43,260.15

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1.5x scale

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.