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Finding the Fourth Proportional to 91,135.94, 125,846.69 and 57,203.24

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Solution

The fourth proportional to 91,135.94, 125,846.69 and 57,203.24 is: 78,990.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    91,135.94 : 125,846.69 = 57,203.24 : x
  2. Step 2: Convert to fraction form
    91,135.94/125,846.69 = 57,203.24/x
  3. Step 3: Cross multiply
    91,135.94x = 125,846.69 × 57,203.24
  4. Step 4: Simplify right side
    91,135.94x = 7,198,837,496.03
  5. Step 5: Solve for x
    x = 7,198,837,496.03/91,135.94
  6. Step 6: Final answer
    x = 78,990.11

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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.