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Finding the Fourth Proportional to 106,639.97, 159,900.42 and 67,112.38

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Solution

The fourth proportional to 106,639.97, 159,900.42 and 67,112.38 is: 100,631.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    106,639.97 : 159,900.42 = 67,112.38 : x
  2. Step 2: Convert to fraction form
    106,639.97/159,900.42 = 67,112.38/x
  3. Step 3: Cross multiply
    106,639.97x = 159,900.42 × 67,112.38
  4. Step 4: Simplify right side
    106,639.97x = 10,731,296,949.70
  5. Step 5: Solve for x
    x = 10,731,296,949.70/106,639.97
  6. Step 6: Final answer
    x = 100,631.09

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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.