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Finding the Fourth Proportional to 275,139.60, 379,772.60 and 178,340.55

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Solution

The fourth proportional to 275,139.60, 379,772.60 and 178,340.55 is: 246,161.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    275,139.60 : 379,772.60 = 178,340.55 : x
  2. Step 2: Convert to fraction form
    275,139.60/379,772.60 = 178,340.55/x
  3. Step 3: Cross multiply
    275,139.60x = 379,772.60 × 178,340.55
  4. Step 4: Simplify right side
    275,139.60x = 67,728,853,467.23
  5. Step 5: Solve for x
    x = 67,728,853,467.23/275,139.60
  6. Step 6: Final answer
    x = 246,161.78

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.