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Finding the Fourth Proportional to 103,940.54, 155,845.47 and 43,937.90

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Solution

The fourth proportional to 103,940.54, 155,845.47 and 43,937.90 is: 65,879.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    103,940.54 : 155,845.47 = 43,937.90 : x
  2. Step 2: Convert to fraction form
    103,940.54/155,845.47 = 43,937.90/x
  3. Step 3: Cross multiply
    103,940.54x = 155,845.47 × 43,937.90
  4. Step 4: Simplify right side
    103,940.54x = 6,847,522,676.31
  5. Step 5: Solve for x
    x = 6,847,522,676.31/103,940.54
  6. Step 6: Final answer
    x = 65,879.23

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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.