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Finding the Fourth Proportional to 68,413.92, 94,411.08 and 40,119.36

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Solution

The fourth proportional to 68,413.92, 94,411.08 and 40,119.36 is: 55,364.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    68,413.92 : 94,411.08 = 40,119.36 : x
  2. Step 2: Convert to fraction form
    68,413.92/94,411.08 = 40,119.36/x
  3. Step 3: Cross multiply
    68,413.92x = 94,411.08 × 40,119.36
  4. Step 4: Simplify right side
    68,413.92x = 3,787,712,106.51
  5. Step 5: Solve for x
    x = 3,787,712,106.51/68,413.92
  6. Step 6: Final answer
    x = 55,364.64

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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.