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Finding the Fourth Proportional to 66,771.10, 100,166.52 and 19,380.05

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Solution

The fourth proportional to 66,771.10, 100,166.52 and 19,380.05 is: 29,072.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,771.10 : 100,166.52 = 19,380.05 : x
  2. Step 2: Convert to fraction form
    66,771.10/100,166.52 = 19,380.05/x
  3. Step 3: Cross multiply
    66,771.10x = 100,166.52 × 19,380.05
  4. Step 4: Simplify right side
    66,771.10x = 1,941,231,568.19
  5. Step 5: Solve for x
    x = 1,941,231,568.19/66,771.10
  6. Step 6: Final answer
    x = 29,072.93

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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.