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Finding the Fourth Proportional to 299,571.60, 449,138.70 and 121,987.20

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Solution

The fourth proportional to 299,571.60, 449,138.70 and 121,987.20 is: 182,891.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    299,571.60 : 449,138.70 = 121,987.20 : x
  2. Step 2: Convert to fraction form
    299,571.60/449,138.70 = 121,987.20/x
  3. Step 3: Cross multiply
    299,571.60x = 449,138.70 × 121,987.20
  4. Step 4: Simplify right side
    299,571.60x = 54,789,172,424.64
  5. Step 5: Solve for x
    x = 54,789,172,424.64/299,571.60
  6. Step 6: Final answer
    x = 182,891.74

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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.