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Finding the Fourth Proportional to 68,415.92, 94,413.84 and 40,121.36

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Solution

The fourth proportional to 68,415.92, 94,413.84 and 40,121.36 is: 55,367.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    68,415.92 : 94,413.84 = 40,121.36 : x
  2. Step 2: Convert to fraction form
    68,415.92/94,413.84 = 40,121.36/x
  3. Step 3: Cross multiply
    68,415.92x = 94,413.84 × 40,121.36
  4. Step 4: Simplify right side
    68,415.92x = 3,788,011,663.62
  5. Step 5: Solve for x
    x = 3,788,011,663.62/68,415.92
  6. Step 6: Final answer
    x = 55,367.40

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These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.