Home / 81,756-123,180.30-73,867.68

Finding the Fourth Proportional to 81,756, 123,180.30 and 73,867.68

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Solution

The fourth proportional to 81,756, 123,180.30 and 73,867.68 is: 111,295.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,756 : 123,180.30 = 73,867.68 : x
  2. Step 2: Convert to fraction form
    81,756/123,180.30 = 73,867.68/x
  3. Step 3: Cross multiply
    81,756x = 123,180.30 × 73,867.68
  4. Step 4: Simplify right side
    81,756x = 9,099,042,982.70
  5. Step 5: Solve for x
    x = 9,099,042,982.70/81,756
  6. Step 6: Final answer
    x = 111,295.11

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Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.