Home / 90,022.20-135,033.30-88,639.80

Finding the Fourth Proportional to 90,022.20, 135,033.30 and 88,639.80

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Solution

The fourth proportional to 90,022.20, 135,033.30 and 88,639.80 is: 132,959.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    90,022.20 : 135,033.30 = 88,639.80 : x
  2. Step 2: Convert to fraction form
    90,022.20/135,033.30 = 88,639.80/x
  3. Step 3: Cross multiply
    90,022.20x = 135,033.30 × 88,639.80
  4. Step 4: Simplify right side
    90,022.20x = 11,969,324,705.34
  5. Step 5: Solve for x
    x = 11,969,324,705.34/90,022.20
  6. Step 6: Final answer
    x = 132,959.70

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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.