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Finding the Fourth Proportional to 209,197.89, 313,789.55 and 67,041.07

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Solution

The fourth proportional to 209,197.89, 313,789.55 and 67,041.07 is: 100,559.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    209,197.89 : 313,789.55 = 67,041.07 : x
  2. Step 2: Convert to fraction form
    209,197.89/313,789.55 = 67,041.07/x
  3. Step 3: Cross multiply
    209,197.89x = 313,789.55 × 67,041.07
  4. Step 4: Simplify right side
    209,197.89x = 21,036,786,067.14
  5. Step 5: Solve for x
    x = 21,036,786,067.14/209,197.89
  6. Step 6: Final answer
    x = 100,559.27

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1.5x scale

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.