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Finding the Fourth Proportional to 91,240.56, 125,942.04 and 57,751.92

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Solution

The fourth proportional to 91,240.56, 125,942.04 and 57,751.92 is: 79,716.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    91,240.56 : 125,942.04 = 57,751.92 : x
  2. Step 2: Convert to fraction form
    91,240.56/125,942.04 = 57,751.92/x
  3. Step 3: Cross multiply
    91,240.56x = 125,942.04 × 57,751.92
  4. Step 4: Simplify right side
    91,240.56x = 7,273,394,618.72
  5. Step 5: Solve for x
    x = 7,273,394,618.72/91,240.56
  6. Step 6: Final answer
    x = 79,716.68

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.