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Finding the Fourth Proportional to 66,102.21, 99,138.73 and 19,358.73

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Solution

The fourth proportional to 66,102.21, 99,138.73 and 19,358.73 is: 29,033.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,102.21 : 99,138.73 = 19,358.73 : x
  2. Step 2: Convert to fraction form
    66,102.21/99,138.73 = 19,358.73/x
  3. Step 3: Cross multiply
    66,102.21x = 99,138.73 × 19,358.73
  4. Step 4: Simplify right side
    66,102.21x = 1,919,199,906.61
  5. Step 5: Solve for x
    x = 1,919,199,906.61/66,102.21
  6. Step 6: Final answer
    x = 29,033.82

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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.