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Finding the Fourth Proportional to 317,379.43, 476,067.09 and 80,720.07

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Solution

The fourth proportional to 317,379.43, 476,067.09 and 80,720.07 is: 121,079.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    317,379.43 : 476,067.09 = 80,720.07 : x
  2. Step 2: Convert to fraction form
    317,379.43/476,067.09 = 80,720.07/x
  3. Step 3: Cross multiply
    317,379.43x = 476,067.09 × 80,720.07
  4. Step 4: Simplify right side
    317,379.43x = 38,428,168,829.50
  5. Step 5: Solve for x
    x = 38,428,168,829.50/317,379.43
  6. Step 6: Final answer
    x = 121,079.58

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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.