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Finding the Fourth Proportional to 66,422.60, 91,660.42 and 36,207.26

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Solution

The fourth proportional to 66,422.60, 91,660.42 and 36,207.26 is: 49,964.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,422.60 : 91,660.42 = 36,207.26 : x
  2. Step 2: Convert to fraction form
    66,422.60/91,660.42 = 36,207.26/x
  3. Step 3: Cross multiply
    66,422.60x = 91,660.42 × 36,207.26
  4. Step 4: Simplify right side
    66,422.60x = 3,318,772,658.65
  5. Step 5: Solve for x
    x = 3,318,772,658.65/66,422.60
  6. Step 6: Final answer
    x = 49,964.51

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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.