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Finding the Fourth Proportional to 78,601.22, 117,949.13 and 28,685.68

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Solution

The fourth proportional to 78,601.22, 117,949.13 and 28,685.68 is: 43,045.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,601.22 : 117,949.13 = 28,685.68 : x
  2. Step 2: Convert to fraction form
    78,601.22/117,949.13 = 28,685.68/x
  3. Step 3: Cross multiply
    78,601.22x = 117,949.13 × 28,685.68
  4. Step 4: Simplify right side
    78,601.22x = 3,383,450,668.73
  5. Step 5: Solve for x
    x = 3,383,450,668.73/78,601.22
  6. Step 6: Final answer
    x = 43,045.78

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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.