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Finding the Fourth Proportional to 90,496.80, 135,745.20 and 75,843.90

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Solution

The fourth proportional to 90,496.80, 135,745.20 and 75,843.90 is: 113,765.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    90,496.80 : 135,745.20 = 75,843.90 : x
  2. Step 2: Convert to fraction form
    90,496.80/135,745.20 = 75,843.90/x
  3. Step 3: Cross multiply
    90,496.80x = 135,745.20 × 75,843.90
  4. Step 4: Simplify right side
    90,496.80x = 10,295,445,374.28
  5. Step 5: Solve for x
    x = 10,295,445,374.28/90,496.80
  6. Step 6: Final answer
    x = 113,765.85

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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.