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Finding the Fourth Proportional to 196,873.80, 271,591.38 and 128,860.84

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Solution

The fourth proportional to 196,873.80, 271,591.38 and 128,860.84 is: 177,766.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    196,873.80 : 271,591.38 = 128,860.84 : x
  2. Step 2: Convert to fraction form
    196,873.80/271,591.38 = 128,860.84/x
  3. Step 3: Cross multiply
    196,873.80x = 271,591.38 × 128,860.84
  4. Step 4: Simplify right side
    196,873.80x = 34,997,493,363.56
  5. Step 5: Solve for x
    x = 34,997,493,363.56/196,873.80
  6. Step 6: Final answer
    x = 177,766.13

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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.