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Finding the Fourth Proportional to 118,821.62, 178,107.08 and 43,893.78

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Solution

The fourth proportional to 118,821.62, 178,107.08 and 43,893.78 is: 65,794.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    118,821.62 : 178,107.08 = 43,893.78 : x
  2. Step 2: Convert to fraction form
    118,821.62/178,107.08 = 43,893.78/x
  3. Step 3: Cross multiply
    118,821.62x = 178,107.08 × 43,893.78
  4. Step 4: Simplify right side
    118,821.62x = 7,817,792,766.49
  5. Step 5: Solve for x
    x = 7,817,792,766.49/118,821.62
  6. Step 6: Final answer
    x = 65,794.37

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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.