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Finding the Fourth Proportional to 79,992.75, 119,996.01 and 20,828.53

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Solution

The fourth proportional to 79,992.75, 119,996.01 and 20,828.53 is: 31,244.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    79,992.75 : 119,996.01 = 20,828.53 : x
  2. Step 2: Convert to fraction form
    79,992.75/119,996.01 = 20,828.53/x
  3. Step 3: Cross multiply
    79,992.75x = 119,996.01 × 20,828.53
  4. Step 4: Simplify right side
    79,992.75x = 2,499,340,494.17
  5. Step 5: Solve for x
    x = 2,499,340,494.17/79,992.75
  6. Step 6: Final answer
    x = 31,244.59

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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.