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Finding the Fourth Proportional to 68,792.97, 103,189.47 and 45,413.94

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Solution

The fourth proportional to 68,792.97, 103,189.47 and 45,413.94 is: 68,120.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    68,792.97 : 103,189.47 = 45,413.94 : x
  2. Step 2: Convert to fraction form
    68,792.97/103,189.47 = 45,413.94/x
  3. Step 3: Cross multiply
    68,792.97x = 103,189.47 × 45,413.94
  4. Step 4: Simplify right side
    68,792.97x = 4,686,240,399.21
  5. Step 5: Solve for x
    x = 4,686,240,399.21/68,792.97
  6. Step 6: Final answer
    x = 68,120.92

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.