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Finding the Fourth Proportional to 68,388.52, 94,391.90 and 40,103.32

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Solution

The fourth proportional to 68,388.52, 94,391.90 and 40,103.32 is: 55,351.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    68,388.52 : 94,391.90 = 40,103.32 : x
  2. Step 2: Convert to fraction form
    68,388.52/94,391.90 = 40,103.32/x
  3. Step 3: Cross multiply
    68,388.52x = 94,391.90 × 40,103.32
  4. Step 4: Simplify right side
    68,388.52x = 3,785,427,898.63
  5. Step 5: Solve for x
    x = 3,785,427,898.63/68,388.52
  6. Step 6: Final answer
    x = 55,351.81

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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.