Home / 79,940.28-119,910.78-20,771.76

Finding the Fourth Proportional to 79,940.28, 119,910.78 and 20,771.76

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Solution

The fourth proportional to 79,940.28, 119,910.78 and 20,771.76 is: 31,157.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    79,940.28 : 119,910.78 = 20,771.76 : x
  2. Step 2: Convert to fraction form
    79,940.28/119,910.78 = 20,771.76/x
  3. Step 3: Cross multiply
    79,940.28x = 119,910.78 × 20,771.76
  4. Step 4: Simplify right side
    79,940.28x = 2,490,757,943.57
  5. Step 5: Solve for x
    x = 2,490,757,943.57/79,940.28
  6. Step 6: Final answer
    x = 31,157.73

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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.