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Finding the Fourth Proportional to 208,960.70, 313,491.45 and 68,711.90

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Solution

The fourth proportional to 208,960.70, 313,491.45 and 68,711.90 is: 103,084.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    208,960.70 : 313,491.45 = 68,711.90 : x
  2. Step 2: Convert to fraction form
    208,960.70/313,491.45 = 68,711.90/x
  3. Step 3: Cross multiply
    208,960.70x = 313,491.45 × 68,711.90
  4. Step 4: Simplify right side
    208,960.70x = 21,540,593,163.26
  5. Step 5: Solve for x
    x = 21,540,593,163.26/208,960.70
  6. Step 6: Final answer
    x = 103,084.42

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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.