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Finding the Fourth Proportional to 92,144.88, 138,129.75 and 36,020.97

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Solution

The fourth proportional to 92,144.88, 138,129.75 and 36,020.97 is: 53,997.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    92,144.88 : 138,129.75 = 36,020.97 : x
  2. Step 2: Convert to fraction form
    92,144.88/138,129.75 = 36,020.97/x
  3. Step 3: Cross multiply
    92,144.88x = 138,129.75 × 36,020.97
  4. Step 4: Simplify right side
    92,144.88x = 4,975,567,580.86
  5. Step 5: Solve for x
    x = 4,975,567,580.86/92,144.88
  6. Step 6: Final answer
    x = 53,997.22

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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.