Home / 90,638.20-135,957.30-81,452.80

Finding the Fourth Proportional to 90,638.20, 135,957.30 and 81,452.80

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Solution

The fourth proportional to 90,638.20, 135,957.30 and 81,452.80 is: 122,179.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    90,638.20 : 135,957.30 = 81,452.80 : x
  2. Step 2: Convert to fraction form
    90,638.20/135,957.30 = 81,452.80/x
  3. Step 3: Cross multiply
    90,638.20x = 135,957.30 × 81,452.80
  4. Step 4: Simplify right side
    90,638.20x = 11,074,102,765.44
  5. Step 5: Solve for x
    x = 11,074,102,765.44/90,638.20
  6. Step 6: Final answer
    x = 122,179.20

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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.