Home / 90,629.80-135,944.70-75,976.90

Finding the Fourth Proportional to 90,629.80, 135,944.70 and 75,976.90

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Solution

The fourth proportional to 90,629.80, 135,944.70 and 75,976.90 is: 113,965.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    90,629.80 : 135,944.70 = 75,976.90 : x
  2. Step 2: Convert to fraction form
    90,629.80/135,944.70 = 75,976.90/x
  3. Step 3: Cross multiply
    90,629.80x = 135,944.70 × 75,976.90
  4. Step 4: Simplify right side
    90,629.80x = 10,328,656,877.43
  5. Step 5: Solve for x
    x = 10,328,656,877.43/90,629.80
  6. Step 6: Final answer
    x = 113,965.35

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Similar ratio
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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.