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Finding the Fourth Proportional to 66,149.79, 91,236.41 and 45,765.77

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Solution

The fourth proportional to 66,149.79, 91,236.41 and 45,765.77 is: 63,121.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,149.79 : 91,236.41 = 45,765.77 : x
  2. Step 2: Convert to fraction form
    66,149.79/91,236.41 = 45,765.77/x
  3. Step 3: Cross multiply
    66,149.79x = 91,236.41 × 45,765.77
  4. Step 4: Simplify right side
    66,149.79x = 4,175,504,042.30
  5. Step 5: Solve for x
    x = 4,175,504,042.30/66,149.79
  6. Step 6: Final answer
    x = 63,121.96

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.