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Finding the Fourth Proportional to 66,371.31, 91,591.70 and 38,081.43

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Solution

The fourth proportional to 66,371.31, 91,591.70 and 38,081.43 is: 52,551.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,371.31 : 91,591.70 = 38,081.43 : x
  2. Step 2: Convert to fraction form
    66,371.31/91,591.70 = 38,081.43/x
  3. Step 3: Cross multiply
    66,371.31x = 91,591.70 × 38,081.43
  4. Step 4: Simplify right side
    66,371.31x = 3,487,942,721.72
  5. Step 5: Solve for x
    x = 3,487,942,721.72/66,371.31
  6. Step 6: Final answer
    x = 52,551.96

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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.