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Finding the Fourth Proportional to 219,786.78, 329,593.91 and 77,601.72

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Solution

The fourth proportional to 219,786.78, 329,593.91 and 77,601.72 is: 116,372.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    219,786.78 : 329,593.91 = 77,601.72 : x
  2. Step 2: Convert to fraction form
    219,786.78/329,593.91 = 77,601.72/x
  3. Step 3: Cross multiply
    219,786.78x = 329,593.91 × 77,601.72
  4. Step 4: Simplify right side
    219,786.78x = 25,577,053,929.52
  5. Step 5: Solve for x
    x = 25,577,053,929.52/219,786.78
  6. Step 6: Final answer
    x = 116,372.12

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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.