Home / 149,289.54-206,021.78-81,309.66

Finding the Fourth Proportional to 149,289.54, 206,021.78 and 81,309.66

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Solution

The fourth proportional to 149,289.54, 206,021.78 and 81,309.66 is: 112,208.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    149,289.54 : 206,021.78 = 81,309.66 : x
  2. Step 2: Convert to fraction form
    149,289.54/206,021.78 = 81,309.66/x
  3. Step 3: Cross multiply
    149,289.54x = 206,021.78 × 81,309.66
  4. Step 4: Simplify right side
    149,289.54x = 16,751,560,884.39
  5. Step 5: Solve for x
    x = 16,751,560,884.39/149,289.54
  6. Step 6: Final answer
    x = 112,208.54

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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.