Home / 80,164.11-120,242.88-20,998.47

Finding the Fourth Proportional to 80,164.11, 120,242.88 and 20,998.47

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Solution

The fourth proportional to 80,164.11, 120,242.88 and 20,998.47 is: 31,496.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    80,164.11 : 120,242.88 = 20,998.47 : x
  2. Step 2: Convert to fraction form
    80,164.11/120,242.88 = 20,998.47/x
  3. Step 3: Cross multiply
    80,164.11x = 120,242.88 × 20,998.47
  4. Step 4: Simplify right side
    80,164.11x = 2,524,916,508.39
  5. Step 5: Solve for x
    x = 2,524,916,508.39/80,164.11
  6. Step 6: Final answer
    x = 31,496.84

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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.