Home / 138,947.52-209,286.84-129,214.56

Finding the Fourth Proportional to 138,947.52, 209,286.84 and 129,214.56

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Solution

The fourth proportional to 138,947.52, 209,286.84 and 129,214.56 is: 194,626.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,947.52 : 209,286.84 = 129,214.56 : x
  2. Step 2: Convert to fraction form
    138,947.52/209,286.84 = 129,214.56/x
  3. Step 3: Cross multiply
    138,947.52x = 209,286.84 × 129,214.56
  4. Step 4: Simplify right side
    138,947.52x = 27,042,906,944.39
  5. Step 5: Solve for x
    x = 27,042,906,944.39/138,947.52
  6. Step 6: Final answer
    x = 194,626.77

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Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.