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Finding the Fourth Proportional to 199,911.30, 299,757.60 and 81,448.80

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Solution

The fourth proportional to 199,911.30, 299,757.60 and 81,448.80 is: 122,128.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    199,911.30 : 299,757.60 = 81,448.80 : x
  2. Step 2: Convert to fraction form
    199,911.30/299,757.60 = 81,448.80/x
  3. Step 3: Cross multiply
    199,911.30x = 299,757.60 × 81,448.80
  4. Step 4: Simplify right side
    199,911.30x = 24,414,896,810.88
  5. Step 5: Solve for x
    x = 24,414,896,810.88/199,911.30
  6. Step 6: Final answer
    x = 122,128.65

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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.