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Finding the Fourth Proportional to 74,768.67, 103,123.80 and 52,107.57

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Solution

The fourth proportional to 74,768.67, 103,123.80 and 52,107.57 is: 71,868.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    74,768.67 : 103,123.80 = 52,107.57 : x
  2. Step 2: Convert to fraction form
    74,768.67/103,123.80 = 52,107.57/x
  3. Step 3: Cross multiply
    74,768.67x = 103,123.80 × 52,107.57
  4. Step 4: Simplify right side
    74,768.67x = 5,373,530,627.17
  5. Step 5: Solve for x
    x = 5,373,530,627.17/74,768.67
  6. Step 6: Final answer
    x = 71,868.75

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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.