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Finding the Fourth Proportional to 68,660.13, 103,162.74 and 43,711.32

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Solution

The fourth proportional to 68,660.13, 103,162.74 and 43,711.32 is: 65,676.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    68,660.13 : 103,162.74 = 43,711.32 : x
  2. Step 2: Convert to fraction form
    68,660.13/103,162.74 = 43,711.32/x
  3. Step 3: Cross multiply
    68,660.13x = 103,162.74 × 43,711.32
  4. Step 4: Simplify right side
    68,660.13x = 4,509,379,540.22
  5. Step 5: Solve for x
    x = 4,509,379,540.22/68,660.13
  6. Step 6: Final answer
    x = 65,676.83

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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.