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Finding the Fourth Proportional to 69,279.62, 103,877.78 and 27,109.40

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Solution

The fourth proportional to 69,279.62, 103,877.78 and 27,109.40 is: 40,647.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    69,279.62 : 103,877.78 = 27,109.40 : x
  2. Step 2: Convert to fraction form
    69,279.62/103,877.78 = 27,109.40/x
  3. Step 3: Cross multiply
    69,279.62x = 103,877.78 × 27,109.40
  4. Step 4: Simplify right side
    69,279.62x = 2,816,063,634.20
  5. Step 5: Solve for x
    x = 2,816,063,634.20/69,279.62
  6. Step 6: Final answer
    x = 40,647.80

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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.