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Finding the Fourth Proportional to 68,578.44, 94,640.04 and 40,278.48

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Solution

The fourth proportional to 68,578.44, 94,640.04 and 40,278.48 is: 55,585.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    68,578.44 : 94,640.04 = 40,278.48 : x
  2. Step 2: Convert to fraction form
    68,578.44/94,640.04 = 40,278.48/x
  3. Step 3: Cross multiply
    68,578.44x = 94,640.04 × 40,278.48
  4. Step 4: Simplify right side
    68,578.44x = 3,811,956,958.34
  5. Step 5: Solve for x
    x = 3,811,956,958.34/68,578.44
  6. Step 6: Final answer
    x = 55,585.36

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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.