Home / 209,290.24-313,928.40-90,961.72

Finding the Fourth Proportional to 209,290.24, 313,928.40 and 90,961.72

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Solution

The fourth proportional to 209,290.24, 313,928.40 and 90,961.72 is: 136,439.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    209,290.24 : 313,928.40 = 90,961.72 : x
  2. Step 2: Convert to fraction form
    209,290.24/313,928.40 = 90,961.72/x
  3. Step 3: Cross multiply
    209,290.24x = 313,928.40 × 90,961.72
  4. Step 4: Simplify right side
    209,290.24x = 28,555,467,220.85
  5. Step 5: Solve for x
    x = 28,555,467,220.85/209,290.24
  6. Step 6: Final answer
    x = 136,439.56

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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.