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Finding the Fourth Proportional to 80,104.55, 120,163.66 and 20,940.13

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Solution

The fourth proportional to 80,104.55, 120,163.66 and 20,940.13 is: 31,411.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    80,104.55 : 120,163.66 = 20,940.13 : x
  2. Step 2: Convert to fraction form
    80,104.55/120,163.66 = 20,940.13/x
  3. Step 3: Cross multiply
    80,104.55x = 120,163.66 × 20,940.13
  4. Step 4: Simplify right side
    80,104.55x = 2,516,242,047.77
  5. Step 5: Solve for x
    x = 2,516,242,047.77/80,104.55
  6. Step 6: Final answer
    x = 31,411.97

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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.