Home / 278,789.44-418,121.04-128,947.48

Finding the Fourth Proportional to 278,789.44, 418,121.04 and 128,947.48

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Solution

The fourth proportional to 278,789.44, 418,121.04 and 128,947.48 is: 193,392.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    278,789.44 : 418,121.04 = 128,947.48 : x
  2. Step 2: Convert to fraction form
    278,789.44/418,121.04 = 128,947.48/x
  3. Step 3: Cross multiply
    278,789.44x = 418,121.04 × 128,947.48
  4. Step 4: Simplify right side
    278,789.44x = 53,915,654,442.98
  5. Step 5: Solve for x
    x = 53,915,654,442.98/278,789.44
  6. Step 6: Final answer
    x = 193,392.03

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1.5x scale

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.