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Finding the Fourth Proportional to 74,791.28, 103,213.12 and 41,257.28

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Solution

The fourth proportional to 74,791.28, 103,213.12 and 41,257.28 is: 56,935.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    74,791.28 : 103,213.12 = 41,257.28 : x
  2. Step 2: Convert to fraction form
    74,791.28/103,213.12 = 41,257.28/x
  3. Step 3: Cross multiply
    74,791.28x = 103,213.12 × 41,257.28
  4. Step 4: Simplify right side
    74,791.28x = 4,258,292,591.51
  5. Step 5: Solve for x
    x = 4,258,292,591.51/74,791.28
  6. Step 6: Final answer
    x = 56,935.68

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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.