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Finding the Fourth Proportional to 408,045.90, 612,067.92 and 108,526.56

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Solution

The fourth proportional to 408,045.90, 612,067.92 and 108,526.56 is: 162,789.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    408,045.90 : 612,067.92 = 108,526.56 : x
  2. Step 2: Convert to fraction form
    408,045.90/612,067.92 = 108,526.56/x
  3. Step 3: Cross multiply
    408,045.90x = 612,067.92 × 108,526.56
  4. Step 4: Simplify right side
    408,045.90x = 66,425,625,843.96
  5. Step 5: Solve for x
    x = 66,425,625,843.96/408,045.90
  6. Step 6: Final answer
    x = 162,789.59

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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.