Home / 135,839.20-203,912.40-80,466.40

Finding the Fourth Proportional to 135,839.20, 203,912.40 and 80,466.40

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Solution

The fourth proportional to 135,839.20, 203,912.40 and 80,466.40 is: 120,790.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    135,839.20 : 203,912.40 = 80,466.40 : x
  2. Step 2: Convert to fraction form
    135,839.20/203,912.40 = 80,466.40/x
  3. Step 3: Cross multiply
    135,839.20x = 203,912.40 × 80,466.40
  4. Step 4: Simplify right side
    135,839.20x = 16,408,096,743.36
  5. Step 5: Solve for x
    x = 16,408,096,743.36/135,839.20
  6. Step 6: Final answer
    x = 120,790.59

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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.