Home / 209,481.45-289,091.61-113,991.63

Finding the Fourth Proportional to 209,481.45, 289,091.61 and 113,991.63

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Solution

The fourth proportional to 209,481.45, 289,091.61 and 113,991.63 is: 157,312.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    209,481.45 : 289,091.61 = 113,991.63 : x
  2. Step 2: Convert to fraction form
    209,481.45/289,091.61 = 113,991.63/x
  3. Step 3: Cross multiply
    209,481.45x = 289,091.61 × 113,991.63
  4. Step 4: Simplify right side
    209,481.45x = 32,954,023,843.22
  5. Step 5: Solve for x
    x = 32,954,023,843.22/209,481.45
  6. Step 6: Final answer
    x = 157,312.37

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.