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Finding the Fourth Proportional to 68,717.66, 103,079.60 and 18,796.64

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Solution

The fourth proportional to 68,717.66, 103,079.60 and 18,796.64 is: 28,195.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    68,717.66 : 103,079.60 = 18,796.64 : x
  2. Step 2: Convert to fraction form
    68,717.66/103,079.60 = 18,796.64/x
  3. Step 3: Cross multiply
    68,717.66x = 103,079.60 × 18,796.64
  4. Step 4: Simplify right side
    68,717.66x = 1,937,550,132.54
  5. Step 5: Solve for x
    x = 1,937,550,132.54/68,717.66
  6. Step 6: Final answer
    x = 28,195.81

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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.