Home / 209,290.16-313,928.19-90,961.51

Finding the Fourth Proportional to 209,290.16, 313,928.19 and 90,961.51

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Solution

The fourth proportional to 209,290.16, 313,928.19 and 90,961.51 is: 136,439.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    209,290.16 : 313,928.19 = 90,961.51 : x
  2. Step 2: Convert to fraction form
    209,290.16/313,928.19 = 90,961.51/x
  3. Step 3: Cross multiply
    209,290.16x = 313,928.19 × 90,961.51
  4. Step 4: Simplify right side
    209,290.16x = 28,555,382,193.97
  5. Step 5: Solve for x
    x = 28,555,382,193.97/209,290.16
  6. Step 6: Final answer
    x = 136,439.20

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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.