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Finding the Fourth Proportional to 217,886.58, 326,727.78 and 91,499.82

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Solution

The fourth proportional to 217,886.58, 326,727.78 and 91,499.82 is: 137,206.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    217,886.58 : 326,727.78 = 91,499.82 : x
  2. Step 2: Convert to fraction form
    217,886.58/326,727.78 = 91,499.82/x
  3. Step 3: Cross multiply
    217,886.58x = 326,727.78 × 91,499.82
  4. Step 4: Simplify right side
    217,886.58x = 29,895,533,059.00
  5. Step 5: Solve for x
    x = 29,895,533,059.00/217,886.58
  6. Step 6: Final answer
    x = 137,206.86

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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.