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Finding the Fourth Proportional to 69,755.80, 104,622.49 and 19,143.00

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Solution

The fourth proportional to 69,755.80, 104,622.49 and 19,143.00 is: 28,711.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    69,755.80 : 104,622.49 = 19,143.00 : x
  2. Step 2: Convert to fraction form
    69,755.80/104,622.49 = 19,143.00/x
  3. Step 3: Cross multiply
    69,755.80x = 104,622.49 × 19,143.00
  4. Step 4: Simplify right side
    69,755.80x = 2,002,788,253.11
  5. Step 5: Solve for x
    x = 2,002,788,253.11/69,755.80
  6. Step 6: Final answer
    x = 28,711.42

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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.