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Finding the Fourth Proportional to 81,745.57, 122,620.67 and 22,581.25

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Solution

The fourth proportional to 81,745.57, 122,620.67 and 22,581.25 is: 33,872.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,745.57 : 122,620.67 = 22,581.25 : x
  2. Step 2: Convert to fraction form
    81,745.57/122,620.67 = 22,581.25/x
  3. Step 3: Cross multiply
    81,745.57x = 122,620.67 × 22,581.25
  4. Step 4: Simplify right side
    81,745.57x = 2,768,928,004.44
  5. Step 5: Solve for x
    x = 2,768,928,004.44/81,745.57
  6. Step 6: Final answer
    x = 33,872.51

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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.