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Finding the Fourth Proportional to 65,508.20, 90,400.87 and 37,213.88

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Solution

The fourth proportional to 65,508.20, 90,400.87 and 37,213.88 is: 51,354.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    65,508.20 : 90,400.87 = 37,213.88 : x
  2. Step 2: Convert to fraction form
    65,508.20/90,400.87 = 37,213.88/x
  3. Step 3: Cross multiply
    65,508.20x = 90,400.87 × 37,213.88
  4. Step 4: Simplify right side
    65,508.20x = 3,364,167,035.04
  5. Step 5: Solve for x
    x = 3,364,167,035.04/65,508.20
  6. Step 6: Final answer
    x = 51,354.90

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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.