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Finding the Fourth Proportional to 68,691.63, 94,755.74 and 40,007.91

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Solution

The fourth proportional to 68,691.63, 94,755.74 and 40,007.91 is: 55,188.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    68,691.63 : 94,755.74 = 40,007.91 : x
  2. Step 2: Convert to fraction form
    68,691.63/94,755.74 = 40,007.91/x
  3. Step 3: Cross multiply
    68,691.63x = 94,755.74 × 40,007.91
  4. Step 4: Simplify right side
    68,691.63x = 3,790,978,917.86
  5. Step 5: Solve for x
    x = 3,790,978,917.86/68,691.63
  6. Step 6: Final answer
    x = 55,188.37

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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.