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Finding the Fourth Proportional to 206,679.81, 285,249.24 and 126,154.11

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Solution

The fourth proportional to 206,679.81, 285,249.24 and 126,154.11 is: 174,111.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    206,679.81 : 285,249.24 = 126,154.11 : x
  2. Step 2: Convert to fraction form
    206,679.81/285,249.24 = 126,154.11/x
  3. Step 3: Cross multiply
    206,679.81x = 285,249.24 × 126,154.11
  4. Step 4: Simplify right side
    206,679.81x = 35,985,364,000.38
  5. Step 5: Solve for x
    x = 35,985,364,000.38/206,679.81
  6. Step 6: Final answer
    x = 174,111.66

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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.