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Finding the Fourth Proportional to 79,221.78, 118,832.88 and 20,057.46

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Solution

The fourth proportional to 79,221.78, 118,832.88 and 20,057.46 is: 30,086.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    79,221.78 : 118,832.88 = 20,057.46 : x
  2. Step 2: Convert to fraction form
    79,221.78/118,832.88 = 20,057.46/x
  3. Step 3: Cross multiply
    79,221.78x = 118,832.88 × 20,057.46
  4. Step 4: Simplify right side
    79,221.78x = 2,383,485,737.28
  5. Step 5: Solve for x
    x = 2,383,485,737.28/79,221.78
  6. Step 6: Final answer
    x = 30,086.24

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1.5x scale

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.