Home / 84,138.78-126,191.19-30,812.56

Finding the Fourth Proportional to 84,138.78, 126,191.19 and 30,812.56

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Solution

The fourth proportional to 84,138.78, 126,191.19 and 30,812.56 is: 46,212.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    84,138.78 : 126,191.19 = 30,812.56 : x
  2. Step 2: Convert to fraction form
    84,138.78/126,191.19 = 30,812.56/x
  3. Step 3: Cross multiply
    84,138.78x = 126,191.19 × 30,812.56
  4. Step 4: Simplify right side
    84,138.78x = 3,888,273,176.81
  5. Step 5: Solve for x
    x = 3,888,273,176.81/84,138.78
  6. Step 6: Final answer
    x = 46,212.62

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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.