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Finding the Fourth Proportional to 80,003.77, 120,005.61 and 20,839.30

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Solution

The fourth proportional to 80,003.77, 120,005.61 and 20,839.30 is: 31,258.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    80,003.77 : 120,005.61 = 20,839.30 : x
  2. Step 2: Convert to fraction form
    80,003.77/120,005.61 = 20,839.30/x
  3. Step 3: Cross multiply
    80,003.77x = 120,005.61 × 20,839.30
  4. Step 4: Simplify right side
    80,003.77x = 2,500,832,908.47
  5. Step 5: Solve for x
    x = 2,500,832,908.47/80,003.77
  6. Step 6: Final answer
    x = 31,258.94

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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.