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Finding the Fourth Proportional to 74,956.70, 103,440.18 and 41,422.70

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Solution

The fourth proportional to 74,956.70, 103,440.18 and 41,422.70 is: 57,163.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    74,956.70 : 103,440.18 = 41,422.70 : x
  2. Step 2: Convert to fraction form
    74,956.70/103,440.18 = 41,422.70/x
  3. Step 3: Cross multiply
    74,956.70x = 103,440.18 × 41,422.70
  4. Step 4: Simplify right side
    74,956.70x = 4,284,771,544.09
  5. Step 5: Solve for x
    x = 4,284,771,544.09/74,956.70
  6. Step 6: Final answer
    x = 57,163.29

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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.