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Finding the Fourth Proportional to 66,640.79, 91,961.78 and 36,425.86

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Solution

The fourth proportional to 66,640.79, 91,961.78 and 36,425.86 is: 50,266.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,640.79 : 91,961.78 = 36,425.86 : x
  2. Step 2: Convert to fraction form
    66,640.79/91,961.78 = 36,425.86/x
  3. Step 3: Cross multiply
    66,640.79x = 91,961.78 × 36,425.86
  4. Step 4: Simplify right side
    66,640.79x = 3,349,786,511.60
  5. Step 5: Solve for x
    x = 3,349,786,511.60/66,640.79
  6. Step 6: Final answer
    x = 50,266.31

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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.