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Finding the Fourth Proportional to 171,187.20, 256,780.80 and 82,419.30

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Solution

The fourth proportional to 171,187.20, 256,780.80 and 82,419.30 is: 123,628.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    171,187.20 : 256,780.80 = 82,419.30 : x
  2. Step 2: Convert to fraction form
    171,187.20/256,780.80 = 82,419.30/x
  3. Step 3: Cross multiply
    171,187.20x = 256,780.80 × 82,419.30
  4. Step 4: Simplify right side
    171,187.20x = 21,163,693,789.44
  5. Step 5: Solve for x
    x = 21,163,693,789.44/171,187.20
  6. Step 6: Final answer
    x = 123,628.95

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1.5x scale

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.