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Finding the Fourth Proportional to 66,099.21, 99,134.24 and 19,355.73

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Solution

The fourth proportional to 66,099.21, 99,134.24 and 19,355.73 is: 29,029.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,099.21 : 99,134.24 = 19,355.73 : x
  2. Step 2: Convert to fraction form
    66,099.21/99,134.24 = 19,355.73/x
  3. Step 3: Cross multiply
    66,099.21x = 99,134.24 × 19,355.73
  4. Step 4: Simplify right side
    66,099.21x = 1,918,815,486.42
  5. Step 5: Solve for x
    x = 1,918,815,486.42/66,099.21
  6. Step 6: Final answer
    x = 29,029.33

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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.