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Finding the Fourth Proportional to 225,978.30, 338,987.15 and 74,129.85

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Solution

The fourth proportional to 225,978.30, 338,987.15 and 74,129.85 is: 111,201.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    225,978.30 : 338,987.15 = 74,129.85 : x
  2. Step 2: Convert to fraction form
    225,978.30/338,987.15 = 74,129.85/x
  3. Step 3: Cross multiply
    225,978.30x = 338,987.15 × 74,129.85
  4. Step 4: Simplify right side
    225,978.30x = 25,129,067,097.82
  5. Step 5: Solve for x
    x = 25,129,067,097.82/225,978.30
  6. Step 6: Final answer
    x = 111,201.24

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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.