Home / 75,731.20-113,605.12-20,331.52

Finding the Fourth Proportional to 75,731.20, 113,605.12 and 20,331.52

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Solution

The fourth proportional to 75,731.20, 113,605.12 and 20,331.52 is: 30,499.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    75,731.20 : 113,605.12 = 20,331.52 : x
  2. Step 2: Convert to fraction form
    75,731.20/113,605.12 = 20,331.52/x
  3. Step 3: Cross multiply
    75,731.20x = 113,605.12 × 20,331.52
  4. Step 4: Simplify right side
    75,731.20x = 2,309,764,769.38
  5. Step 5: Solve for x
    x = 2,309,764,769.38/75,731.20
  6. Step 6: Final answer
    x = 30,499.51

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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.