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Finding the Fourth Proportional to 84,629.70, 126,950.94 and 28,469.97

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Solution

The fourth proportional to 84,629.70, 126,950.94 and 28,469.97 is: 42,707.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    84,629.70 : 126,950.94 = 28,469.97 : x
  2. Step 2: Convert to fraction form
    84,629.70/126,950.94 = 28,469.97/x
  3. Step 3: Cross multiply
    84,629.70x = 126,950.94 × 28,469.97
  4. Step 4: Simplify right side
    84,629.70x = 3,614,289,453.27
  5. Step 5: Solve for x
    x = 3,614,289,453.27/84,629.70
  6. Step 6: Final answer
    x = 42,707.10

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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.