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Finding the Fourth Proportional to 66,190, 99,285 and 16,942

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Solution

The fourth proportional to 66,190, 99,285 and 16,942 is: 25,413

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,190 : 99,285 = 16,942 : x
  2. Step 2: Convert to fraction form
    66,190/99,285 = 16,942/x
  3. Step 3: Cross multiply
    66,190x = 99,285 × 16,942
  4. Step 4: Simplify right side
    66,190x = 1,682,086,470
  5. Step 5: Solve for x
    x = 1,682,086,470/66,190
  6. Step 6: Final answer
    x = 25,413

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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.