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Finding the Fourth Proportional to 48,921.80, 73,392.11 and 20,841.32

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Solution

The fourth proportional to 48,921.80, 73,392.11 and 20,841.32 is: 31,265.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    48,921.80 : 73,392.11 = 20,841.32 : x
  2. Step 2: Convert to fraction form
    48,921.80/73,392.11 = 20,841.32/x
  3. Step 3: Cross multiply
    48,921.80x = 73,392.11 × 20,841.32
  4. Step 4: Simplify right side
    48,921.80x = 1,529,587,978.82
  5. Step 5: Solve for x
    x = 1,529,587,978.82/48,921.80
  6. Step 6: Final answer
    x = 31,265.98

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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.