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Finding the Fourth Proportional to 69,813.70, 104,720.55 and 54,067.30

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Solution

The fourth proportional to 69,813.70, 104,720.55 and 54,067.30 is: 81,100.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    69,813.70 : 104,720.55 = 54,067.30 : x
  2. Step 2: Convert to fraction form
    69,813.70/104,720.55 = 54,067.30/x
  3. Step 3: Cross multiply
    69,813.70x = 104,720.55 × 54,067.30
  4. Step 4: Simplify right side
    69,813.70x = 5,661,957,393.02
  5. Step 5: Solve for x
    x = 5,661,957,393.02/69,813.70
  6. Step 6: Final answer
    x = 81,100.95

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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.