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Finding the Fourth Proportional to 270,979.44, 406,490.19 and 81,425.01

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Solution

The fourth proportional to 270,979.44, 406,490.19 and 81,425.01 is: 122,143.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    270,979.44 : 406,490.19 = 81,425.01 : x
  2. Step 2: Convert to fraction form
    270,979.44/406,490.19 = 81,425.01/x
  3. Step 3: Cross multiply
    270,979.44x = 406,490.19 × 81,425.01
  4. Step 4: Simplify right side
    270,979.44x = 33,098,467,785.65
  5. Step 5: Solve for x
    x = 33,098,467,785.65/270,979.44
  6. Step 6: Final answer
    x = 122,143.83

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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.