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Finding the Fourth Proportional to 68,792.15, 103,188.25 and 45,413.12

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Solution

The fourth proportional to 68,792.15, 103,188.25 and 45,413.12 is: 68,119.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    68,792.15 : 103,188.25 = 45,413.12 : x
  2. Step 2: Convert to fraction form
    68,792.15/103,188.25 = 45,413.12/x
  3. Step 3: Cross multiply
    68,792.15x = 103,188.25 × 45,413.12
  4. Step 4: Simplify right side
    68,792.15x = 4,686,100,694.58
  5. Step 5: Solve for x
    x = 4,686,100,694.58/68,792.15
  6. Step 6: Final answer
    x = 68,119.70

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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.