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Finding the Fourth Proportional to 317,908.94, 476,862.20 and 81,251.24

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Solution

The fourth proportional to 317,908.94, 476,862.20 and 81,251.24 is: 121,876.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    317,908.94 : 476,862.20 = 81,251.24 : x
  2. Step 2: Convert to fraction form
    317,908.94/476,862.20 = 81,251.24/x
  3. Step 3: Cross multiply
    317,908.94x = 476,862.20 × 81,251.24
  4. Step 4: Simplify right side
    317,908.94x = 38,745,645,845.03
  5. Step 5: Solve for x
    x = 38,745,645,845.03/317,908.94
  6. Step 6: Final answer
    x = 121,876.55

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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.