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Finding the Fourth Proportional to 66,335.89, 91,540.42 and 36,121.08

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Solution

The fourth proportional to 66,335.89, 91,540.42 and 36,121.08 is: 49,845.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,335.89 : 91,540.42 = 36,121.08 : x
  2. Step 2: Convert to fraction form
    66,335.89/91,540.42 = 36,121.08/x
  3. Step 3: Cross multiply
    66,335.89x = 91,540.42 × 36,121.08
  4. Step 4: Simplify right side
    66,335.89x = 3,306,538,392.59
  5. Step 5: Solve for x
    x = 3,306,538,392.59/66,335.89
  6. Step 6: Final answer
    x = 49,845.39

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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.