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Finding the Fourth Proportional to 270,003.28, 405,259.15 and 136,979

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Solution

The fourth proportional to 270,003.28, 405,259.15 and 136,979 is: 205,597.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    270,003.28 : 405,259.15 = 136,979 : x
  2. Step 2: Convert to fraction form
    270,003.28/405,259.15 = 136,979/x
  3. Step 3: Cross multiply
    270,003.28x = 405,259.15 × 136,979
  4. Step 4: Simplify right side
    270,003.28x = 55,511,993,107.85
  5. Step 5: Solve for x
    x = 55,511,993,107.85/270,003.28
  6. Step 6: Final answer
    x = 205,597.48

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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.