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Finding the Fourth Proportional to 219,062.38, 328,593.57 and 86,005.30

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Solution

The fourth proportional to 219,062.38, 328,593.57 and 86,005.30 is: 129,007.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    219,062.38 : 328,593.57 = 86,005.30 : x
  2. Step 2: Convert to fraction form
    219,062.38/328,593.57 = 86,005.30/x
  3. Step 3: Cross multiply
    219,062.38x = 328,593.57 × 86,005.30
  4. Step 4: Simplify right side
    219,062.38x = 28,260,788,565.92
  5. Step 5: Solve for x
    x = 28,260,788,565.92/219,062.38
  6. Step 6: Final answer
    x = 129,007.95

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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.