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Finding the Fourth Proportional to 209,287.59, 313,924.37 and 90,958.92

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Solution

The fourth proportional to 209,287.59, 313,924.37 and 90,958.92 is: 136,435.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    209,287.59 : 313,924.37 = 90,958.92 : x
  2. Step 2: Convert to fraction form
    209,287.59/313,924.37 = 90,958.92/x
  3. Step 3: Cross multiply
    209,287.59x = 313,924.37 × 90,958.92
  4. Step 4: Simplify right side
    209,287.59x = 28,554,221,202.09
  5. Step 5: Solve for x
    x = 28,554,221,202.09/209,287.59
  6. Step 6: Final answer
    x = 136,435.33

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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.