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Finding the Fourth Proportional to 317,760.21, 476,639.82 and 81,102.87

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Solution

The fourth proportional to 317,760.21, 476,639.82 and 81,102.87 is: 121,654.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    317,760.21 : 476,639.82 = 81,102.87 : x
  2. Step 2: Convert to fraction form
    317,760.21/476,639.82 = 81,102.87/x
  3. Step 3: Cross multiply
    317,760.21x = 476,639.82 × 81,102.87
  4. Step 4: Simplify right side
    317,760.21x = 38,656,857,358.28
  5. Step 5: Solve for x
    x = 38,656,857,358.28/317,760.21
  6. Step 6: Final answer
    x = 121,654.18

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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.