Home / 209,003.25-313,406-80,979.46

Finding the Fourth Proportional to 209,003.25, 313,406 and 80,979.46

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Solution

The fourth proportional to 209,003.25, 313,406 and 80,979.46 is: 121,430.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    209,003.25 : 313,406 = 80,979.46 : x
  2. Step 2: Convert to fraction form
    209,003.25/313,406 = 80,979.46/x
  3. Step 3: Cross multiply
    209,003.25x = 313,406 × 80,979.46
  4. Step 4: Simplify right side
    209,003.25x = 25,379,448,640.76
  5. Step 5: Solve for x
    x = 25,379,448,640.76/209,003.25
  6. Step 6: Final answer
    x = 121,430.88

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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.