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Finding the Fourth Proportional to 217,078.94, 325,648.98 and 67,331.40

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Solution

The fourth proportional to 217,078.94, 325,648.98 and 67,331.40 is: 101,006.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    217,078.94 : 325,648.98 = 67,331.40 : x
  2. Step 2: Convert to fraction form
    217,078.94/325,648.98 = 67,331.40/x
  3. Step 3: Cross multiply
    217,078.94x = 325,648.98 × 67,331.40
  4. Step 4: Simplify right side
    217,078.94x = 21,926,401,731.97
  5. Step 5: Solve for x
    x = 21,926,401,731.97/217,078.94
  6. Step 6: Final answer
    x = 101,006.58

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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.