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Finding the Fourth Proportional to 92,672.91, 138,988.10 and 55,243.62

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Solution

The fourth proportional to 92,672.91, 138,988.10 and 55,243.62 is: 82,852.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    92,672.91 : 138,988.10 = 55,243.62 : x
  2. Step 2: Convert to fraction form
    92,672.91/138,988.10 = 55,243.62/x
  3. Step 3: Cross multiply
    92,672.91x = 138,988.10 × 55,243.62
  4. Step 4: Simplify right side
    92,672.91x = 7,678,205,919.03
  5. Step 5: Solve for x
    x = 7,678,205,919.03/92,672.91
  6. Step 6: Final answer
    x = 82,852.76

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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.