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Finding the Fourth Proportional to 70,725.69, 106,072.11 and 20,792.43

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Solution

The fourth proportional to 70,725.69, 106,072.11 and 20,792.43 is: 31,183.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    70,725.69 : 106,072.11 = 20,792.43 : x
  2. Step 2: Convert to fraction form
    70,725.69/106,072.11 = 20,792.43/x
  3. Step 3: Cross multiply
    70,725.69x = 106,072.11 × 20,792.43
  4. Step 4: Simplify right side
    70,725.69x = 2,205,496,922.13
  5. Step 5: Solve for x
    x = 2,205,496,922.13/70,725.69
  6. Step 6: Final answer
    x = 31,183.82

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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.