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Finding the Fourth Proportional to 68,792.78, 103,189.19 and 45,413.75

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Solution

The fourth proportional to 68,792.78, 103,189.19 and 45,413.75 is: 68,120.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    68,792.78 : 103,189.19 = 45,413.75 : x
  2. Step 2: Convert to fraction form
    68,792.78/103,189.19 = 45,413.75/x
  3. Step 3: Cross multiply
    68,792.78x = 103,189.19 × 45,413.75
  4. Step 4: Simplify right side
    68,792.78x = 4,686,208,077.36
  5. Step 5: Solve for x
    x = 4,686,208,077.36/68,792.78
  6. Step 6: Final answer
    x = 68,120.64

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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.