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Finding the Fourth Proportional to 317,906.58, 476,860.05 and 81,249.48

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Solution

The fourth proportional to 317,906.58, 476,860.05 and 81,249.48 is: 121,874.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    317,906.58 : 476,860.05 = 81,249.48 : x
  2. Step 2: Convert to fraction form
    317,906.58/476,860.05 = 81,249.48/x
  3. Step 3: Cross multiply
    317,906.58x = 476,860.05 × 81,249.48
  4. Step 4: Simplify right side
    317,906.58x = 38,744,631,095.27
  5. Step 5: Solve for x
    x = 38,744,631,095.27/317,906.58
  6. Step 6: Final answer
    x = 121,874.27

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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.