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Finding the Fourth Proportional to 68,914.92, 103,390.20 and 28,912.44

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Solution

The fourth proportional to 68,914.92, 103,390.20 and 28,912.44 is: 43,376.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    68,914.92 : 103,390.20 = 28,912.44 : x
  2. Step 2: Convert to fraction form
    68,914.92/103,390.20 = 28,912.44/x
  3. Step 3: Cross multiply
    68,914.92x = 103,390.20 × 28,912.44
  4. Step 4: Simplify right side
    68,914.92x = 2,989,262,954.09
  5. Step 5: Solve for x
    x = 2,989,262,954.09/68,914.92
  6. Step 6: Final answer
    x = 43,376.14

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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.