Home / 209,290.59-313,928.86-90,961.92

Finding the Fourth Proportional to 209,290.59, 313,928.86 and 90,961.92

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Solution

The fourth proportional to 209,290.59, 313,928.86 and 90,961.92 is: 136,439.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    209,290.59 : 313,928.86 = 90,961.92 : x
  2. Step 2: Convert to fraction form
    209,290.59/313,928.86 = 90,961.92/x
  3. Step 3: Cross multiply
    209,290.59x = 313,928.86 × 90,961.92
  4. Step 4: Simplify right side
    209,290.59x = 28,555,571,849.01
  5. Step 5: Solve for x
    x = 28,555,571,849.01/209,290.59
  6. Step 6: Final answer
    x = 136,439.83

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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.