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Finding the Fourth Proportional to 68,781.39, 94,928.94 and 38,578.92

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Solution

The fourth proportional to 68,781.39, 94,928.94 and 38,578.92 is: 53,244.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    68,781.39 : 94,928.94 = 38,578.92 : x
  2. Step 2: Convert to fraction form
    68,781.39/94,928.94 = 38,578.92/x
  3. Step 3: Cross multiply
    68,781.39x = 94,928.94 × 38,578.92
  4. Step 4: Simplify right side
    68,781.39x = 3,662,255,981.94
  5. Step 5: Solve for x
    x = 3,662,255,981.94/68,781.39
  6. Step 6: Final answer
    x = 53,244.87

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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.