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Finding the Fourth Proportional to 203,691.81, 281,065.90 and 122,000.88

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Solution

The fourth proportional to 203,691.81, 281,065.90 and 122,000.88 is: 168,343.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    203,691.81 : 281,065.90 = 122,000.88 : x
  2. Step 2: Convert to fraction form
    203,691.81/281,065.90 = 122,000.88/x
  3. Step 3: Cross multiply
    203,691.81x = 281,065.90 × 122,000.88
  4. Step 4: Simplify right side
    203,691.81x = 34,290,288,115.74
  5. Step 5: Solve for x
    x = 34,290,288,115.74/203,691.81
  6. Step 6: Final answer
    x = 168,343.97

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1.5x scale

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.