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Finding the Fourth Proportional to 70,028.91, 105,049.89 and 27,898.79

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Solution

The fourth proportional to 70,028.91, 105,049.89 and 27,898.79 is: 41,850.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    70,028.91 : 105,049.89 = 27,898.79 : x
  2. Step 2: Convert to fraction form
    70,028.91/105,049.89 = 27,898.79/x
  3. Step 3: Cross multiply
    70,028.91x = 105,049.89 × 27,898.79
  4. Step 4: Simplify right side
    70,028.91x = 2,930,764,295.38
  5. Step 5: Solve for x
    x = 2,930,764,295.38/70,028.91
  6. Step 6: Final answer
    x = 41,850.78

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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.