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Finding the Fourth Proportional to 66,422.91, 91,662.42 and 36,208.47

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Solution

The fourth proportional to 66,422.91, 91,662.42 and 36,208.47 is: 49,967.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,422.91 : 91,662.42 = 36,208.47 : x
  2. Step 2: Convert to fraction form
    66,422.91/91,662.42 = 36,208.47/x
  3. Step 3: Cross multiply
    66,422.91x = 91,662.42 × 36,208.47
  4. Step 4: Simplify right side
    66,422.91x = 3,318,955,984.70
  5. Step 5: Solve for x
    x = 3,318,955,984.70/66,422.91
  6. Step 6: Final answer
    x = 49,967.04

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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.