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Finding the Fourth Proportional to 66,494.88, 99,758.61 and 19,747.80

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Solution

The fourth proportional to 66,494.88, 99,758.61 and 19,747.80 is: 29,626.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,494.88 : 99,758.61 = 19,747.80 : x
  2. Step 2: Convert to fraction form
    66,494.88/99,758.61 = 19,747.80/x
  3. Step 3: Cross multiply
    66,494.88x = 99,758.61 × 19,747.80
  4. Step 4: Simplify right side
    66,494.88x = 1,970,013,078.56
  5. Step 5: Solve for x
    x = 1,970,013,078.56/66,494.88
  6. Step 6: Final answer
    x = 29,626.54

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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.