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Finding the Fourth Proportional to 219,805.05, 329,661.44 and 61,996.60

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Solution

The fourth proportional to 219,805.05, 329,661.44 and 61,996.60 is: 92,981.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    219,805.05 : 329,661.44 = 61,996.60 : x
  2. Step 2: Convert to fraction form
    219,805.05/329,661.44 = 61,996.60/x
  3. Step 3: Cross multiply
    219,805.05x = 329,661.44 × 61,996.60
  4. Step 4: Simplify right side
    219,805.05x = 20,437,887,451.96
  5. Step 5: Solve for x
    x = 20,437,887,451.96/219,805.05
  6. Step 6: Final answer
    x = 92,981.88

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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.