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Finding the Fourth Proportional to 74,689.75, 103,076.85 and 41,155.75

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Solution

The fourth proportional to 74,689.75, 103,076.85 and 41,155.75 is: 56,797.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    74,689.75 : 103,076.85 = 41,155.75 : x
  2. Step 2: Convert to fraction form
    74,689.75/103,076.85 = 41,155.75/x
  3. Step 3: Cross multiply
    74,689.75x = 103,076.85 × 41,155.75
  4. Step 4: Simplify right side
    74,689.75x = 4,242,205,069.39
  5. Step 5: Solve for x
    x = 4,242,205,069.39/74,689.75
  6. Step 6: Final answer
    x = 56,797.69

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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.