Home / 138,629.76-191,358.09-82,041

Finding the Fourth Proportional to 138,629.76, 191,358.09 and 82,041

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Solution

The fourth proportional to 138,629.76, 191,358.09 and 82,041 is: 113,245.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,629.76 : 191,358.09 = 82,041 : x
  2. Step 2: Convert to fraction form
    138,629.76/191,358.09 = 82,041/x
  3. Step 3: Cross multiply
    138,629.76x = 191,358.09 × 82,041
  4. Step 4: Simplify right side
    138,629.76x = 15,699,209,061.69
  5. Step 5: Solve for x
    x = 15,699,209,061.69/138,629.76
  6. Step 6: Final answer
    x = 113,245.59

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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.