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Finding the Fourth Proportional to 199,793.70, 299,435.40 and 81,331.20

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Solution

The fourth proportional to 199,793.70, 299,435.40 and 81,331.20 is: 121,892.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    199,793.70 : 299,435.40 = 81,331.20 : x
  2. Step 2: Convert to fraction form
    199,793.70/299,435.40 = 81,331.20/x
  3. Step 3: Cross multiply
    199,793.70x = 299,435.40 × 81,331.20
  4. Step 4: Simplify right side
    199,793.70x = 24,353,440,404.48
  5. Step 5: Solve for x
    x = 24,353,440,404.48/199,793.70
  6. Step 6: Final answer
    x = 121,892.93

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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.