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Finding the Fourth Proportional to 66,198.80, 99,288.60 and 19,446.80

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Solution

The fourth proportional to 66,198.80, 99,288.60 and 19,446.80 is: 29,167.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,198.80 : 99,288.60 = 19,446.80 : x
  2. Step 2: Convert to fraction form
    66,198.80/99,288.60 = 19,446.80/x
  3. Step 3: Cross multiply
    66,198.80x = 99,288.60 × 19,446.80
  4. Step 4: Simplify right side
    66,198.80x = 1,930,845,546.48
  5. Step 5: Solve for x
    x = 1,930,845,546.48/66,198.80
  6. Step 6: Final answer
    x = 29,167.38

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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.