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Finding the Fourth Proportional to 68,717.91, 103,079.97 and 18,796.89

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Solution

The fourth proportional to 68,717.91, 103,079.97 and 18,796.89 is: 28,196.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    68,717.91 : 103,079.97 = 18,796.89 : x
  2. Step 2: Convert to fraction form
    68,717.91/103,079.97 = 18,796.89/x
  3. Step 3: Cross multiply
    68,717.91x = 103,079.97 × 18,796.89
  4. Step 4: Simplify right side
    68,717.91x = 1,937,582,857.29
  5. Step 5: Solve for x
    x = 1,937,582,857.29/68,717.91
  6. Step 6: Final answer
    x = 28,196.18

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.