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Finding the Fourth Proportional to 399,987.20, 600,067.20 and 119,532.80

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Solution

The fourth proportional to 399,987.20, 600,067.20 and 119,532.80 is: 179,325.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    399,987.20 : 600,067.20 = 119,532.80 : x
  2. Step 2: Convert to fraction form
    399,987.20/600,067.20 = 119,532.80/x
  3. Step 3: Cross multiply
    399,987.20x = 600,067.20 × 119,532.80
  4. Step 4: Simplify right side
    399,987.20x = 71,727,712,604.16
  5. Step 5: Solve for x
    x = 71,727,712,604.16/399,987.20
  6. Step 6: Final answer
    x = 179,325.02

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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.