Home / 73,078.20-109,609.20-20,489.76

Finding the Fourth Proportional to 73,078.20, 109,609.20 and 20,489.76

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Solution

The fourth proportional to 73,078.20, 109,609.20 and 20,489.76 is: 30,732.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    73,078.20 : 109,609.20 = 20,489.76 : x
  2. Step 2: Convert to fraction form
    73,078.20/109,609.20 = 20,489.76/x
  3. Step 3: Cross multiply
    73,078.20x = 109,609.20 × 20,489.76
  4. Step 4: Simplify right side
    73,078.20x = 2,245,866,201.79
  5. Step 5: Solve for x
    x = 2,245,866,201.79/73,078.20
  6. Step 6: Final answer
    x = 30,732.37

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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.