Home / 80,157.43-120,232.60-20,991.79

Finding the Fourth Proportional to 80,157.43, 120,232.60 and 20,991.79

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Solution

The fourth proportional to 80,157.43, 120,232.60 and 20,991.79 is: 31,486.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    80,157.43 : 120,232.60 = 20,991.79 : x
  2. Step 2: Convert to fraction form
    80,157.43/120,232.60 = 20,991.79/x
  3. Step 3: Cross multiply
    80,157.43x = 120,232.60 × 20,991.79
  4. Step 4: Simplify right side
    80,157.43x = 2,523,897,490.35
  5. Step 5: Solve for x
    x = 2,523,897,490.35/80,157.43
  6. Step 6: Final answer
    x = 31,486.76

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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.