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Finding the Fourth Proportional to 79,221.65, 118,832.74 and 20,057.29

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Solution

The fourth proportional to 79,221.65, 118,832.74 and 20,057.29 is: 30,086.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    79,221.65 : 118,832.74 = 20,057.29 : x
  2. Step 2: Convert to fraction form
    79,221.65/118,832.74 = 20,057.29/x
  3. Step 3: Cross multiply
    79,221.65x = 118,832.74 × 20,057.29
  4. Step 4: Simplify right side
    79,221.65x = 2,383,462,380.45
  5. Step 5: Solve for x
    x = 2,383,462,380.45/79,221.65
  6. Step 6: Final answer
    x = 30,086.00

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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.