Home / 80,505.06-120,760.83-20,535.09

Finding the Fourth Proportional to 80,505.06, 120,760.83 and 20,535.09

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Solution

The fourth proportional to 80,505.06, 120,760.83 and 20,535.09 is: 30,803.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    80,505.06 : 120,760.83 = 20,535.09 : x
  2. Step 2: Convert to fraction form
    80,505.06/120,760.83 = 20,535.09/x
  3. Step 3: Cross multiply
    80,505.06x = 120,760.83 × 20,535.09
  4. Step 4: Simplify right side
    80,505.06x = 2,479,834,512.52
  5. Step 5: Solve for x
    x = 2,479,834,512.52/80,505.06
  6. Step 6: Final answer
    x = 30,803.46

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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.