Home / 208,711.26-312,930.78-137,418.12

Finding the Fourth Proportional to 208,711.26, 312,930.78 and 137,418.12

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Solution

The fourth proportional to 208,711.26, 312,930.78 and 137,418.12 is: 206,037.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    208,711.26 : 312,930.78 = 137,418.12 : x
  2. Step 2: Convert to fraction form
    208,711.26/312,930.78 = 137,418.12/x
  3. Step 3: Cross multiply
    208,711.26x = 312,930.78 × 137,418.12
  4. Step 4: Simplify right side
    208,711.26x = 43,002,359,477.73
  5. Step 5: Solve for x
    x = 43,002,359,477.73/208,711.26
  6. Step 6: Final answer
    x = 206,037.56

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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.