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Finding the Fourth Proportional to 317,743.87, 476,615.39 and 81,086.54

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Solution

The fourth proportional to 317,743.87, 476,615.39 and 81,086.54 is: 121,629.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    317,743.87 : 476,615.39 = 81,086.54 : x
  2. Step 2: Convert to fraction form
    317,743.87/476,615.39 = 81,086.54/x
  3. Step 3: Cross multiply
    317,743.87x = 476,615.39 × 81,086.54
  4. Step 4: Simplify right side
    317,743.87x = 38,647,094,280.11
  5. Step 5: Solve for x
    x = 38,647,094,280.11/317,743.87
  6. Step 6: Final answer
    x = 121,629.71

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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.