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Finding the Fourth Proportional to 68,993.92, 103,469.28 and 45,743.68

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Solution

The fourth proportional to 68,993.92, 103,469.28 and 45,743.68 is: 68,601.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    68,993.92 : 103,469.28 = 45,743.68 : x
  2. Step 2: Convert to fraction form
    68,993.92/103,469.28 = 45,743.68/x
  3. Step 3: Cross multiply
    68,993.92x = 103,469.28 × 45,743.68
  4. Step 4: Simplify right side
    68,993.92x = 4,733,065,634.15
  5. Step 5: Solve for x
    x = 4,733,065,634.15/68,993.92
  6. Step 6: Final answer
    x = 68,601.20

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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.