Home / 80,564.92-120,837.83-21,405.15

Finding the Fourth Proportional to 80,564.92, 120,837.83 and 21,405.15

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Solution

The fourth proportional to 80,564.92, 120,837.83 and 21,405.15 is: 32,105.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    80,564.92 : 120,837.83 = 21,405.15 : x
  2. Step 2: Convert to fraction form
    80,564.92/120,837.83 = 21,405.15/x
  3. Step 3: Cross multiply
    80,564.92x = 120,837.83 × 21,405.15
  4. Step 4: Simplify right side
    80,564.92x = 2,586,551,769.80
  5. Step 5: Solve for x
    x = 2,586,551,769.80/80,564.92
  6. Step 6: Final answer
    x = 32,105.19

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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.