Home / 80,759.88-121,134.83-30,149.06

Finding the Fourth Proportional to 80,759.88, 121,134.83 and 30,149.06

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Solution

The fourth proportional to 80,759.88, 121,134.83 and 30,149.06 is: 45,221.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    80,759.88 : 121,134.83 = 30,149.06 : x
  2. Step 2: Convert to fraction form
    80,759.88/121,134.83 = 30,149.06/x
  3. Step 3: Cross multiply
    80,759.88x = 121,134.83 × 30,149.06
  4. Step 4: Simplify right side
    80,759.88x = 3,652,100,501.34
  5. Step 5: Solve for x
    x = 3,652,100,501.34/80,759.88
  6. Step 6: Final answer
    x = 45,221.72

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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.