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Finding the Fourth Proportional to 199,621.20, 299,431.80 and 120,889.20

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Solution

The fourth proportional to 199,621.20, 299,431.80 and 120,889.20 is: 181,333.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    199,621.20 : 299,431.80 = 120,889.20 : x
  2. Step 2: Convert to fraction form
    199,621.20/299,431.80 = 120,889.20/x
  3. Step 3: Cross multiply
    199,621.20x = 299,431.80 × 120,889.20
  4. Step 4: Simplify right side
    199,621.20x = 36,198,070,756.56
  5. Step 5: Solve for x
    x = 36,198,070,756.56/199,621.20
  6. Step 6: Final answer
    x = 181,333.80

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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.