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Finding the Fourth Proportional to 199,579.20, 299,410.40 and 66,500.80

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Solution

The fourth proportional to 199,579.20, 299,410.40 and 66,500.80 is: 99,765.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    199,579.20 : 299,410.40 = 66,500.80 : x
  2. Step 2: Convert to fraction form
    199,579.20/299,410.40 = 66,500.80/x
  3. Step 3: Cross multiply
    199,579.20x = 299,410.40 × 66,500.80
  4. Step 4: Simplify right side
    199,579.20x = 19,911,031,128.32
  5. Step 5: Solve for x
    x = 19,911,031,128.32/199,579.20
  6. Step 6: Final answer
    x = 99,765.06

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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.