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Finding the Fourth Proportional to 79,644.60, 119,471.22 and 20,480.76

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Solution

The fourth proportional to 79,644.60, 119,471.22 and 20,480.76 is: 30,722.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    79,644.60 : 119,471.22 = 20,480.76 : x
  2. Step 2: Convert to fraction form
    79,644.60/119,471.22 = 20,480.76/x
  3. Step 3: Cross multiply
    79,644.60x = 119,471.22 × 20,480.76
  4. Step 4: Simplify right side
    79,644.60x = 2,446,861,383.73
  5. Step 5: Solve for x
    x = 2,446,861,383.73/79,644.60
  6. Step 6: Final answer
    x = 30,722.25

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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.