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Finding the Fourth Proportional to 66,611.91, 91,921.70 and 36,398.27

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Solution

The fourth proportional to 66,611.91, 91,921.70 and 36,398.27 is: 50,228.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,611.91 : 91,921.70 = 36,398.27 : x
  2. Step 2: Convert to fraction form
    66,611.91/91,921.70 = 36,398.27/x
  3. Step 3: Cross multiply
    66,611.91x = 91,921.70 × 36,398.27
  4. Step 4: Simplify right side
    66,611.91x = 3,345,790,855.46
  5. Step 5: Solve for x
    x = 3,345,790,855.46/66,611.91
  6. Step 6: Final answer
    x = 50,228.12

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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.