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Finding the Fourth Proportional to 68,388.78, 94,392.24 and 40,103.58

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Solution

The fourth proportional to 68,388.78, 94,392.24 and 40,103.58 is: 55,352.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    68,388.78 : 94,392.24 = 40,103.58 : x
  2. Step 2: Convert to fraction form
    68,388.78/94,392.24 = 40,103.58/x
  3. Step 3: Cross multiply
    68,388.78x = 94,392.24 × 40,103.58
  4. Step 4: Simplify right side
    68,388.78x = 3,785,466,748.22
  5. Step 5: Solve for x
    x = 3,785,466,748.22/68,388.78
  6. Step 6: Final answer
    x = 55,352.16

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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.