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Finding the Fourth Proportional to 49,299.80, 73,959.30 and 21,219.80

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Solution

The fourth proportional to 49,299.80, 73,959.30 and 21,219.80 is: 31,833.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    49,299.80 : 73,959.30 = 21,219.80 : x
  2. Step 2: Convert to fraction form
    49,299.80/73,959.30 = 21,219.80/x
  3. Step 3: Cross multiply
    49,299.80x = 73,959.30 × 21,219.80
  4. Step 4: Simplify right side
    49,299.80x = 1,569,401,554.14
  5. Step 5: Solve for x
    x = 1,569,401,554.14/49,299.80
  6. Step 6: Final answer
    x = 31,833.83

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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.