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Finding the Fourth Proportional to 66,422.56, 91,661.29 and 36,208.47

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Solution

The fourth proportional to 66,422.56, 91,661.29 and 36,208.47 is: 49,966.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,422.56 : 91,661.29 = 36,208.47 : x
  2. Step 2: Convert to fraction form
    66,422.56/91,661.29 = 36,208.47/x
  3. Step 3: Cross multiply
    66,422.56x = 91,661.29 × 36,208.47
  4. Step 4: Simplify right side
    66,422.56x = 3,318,914,610.82
  5. Step 5: Solve for x
    x = 3,318,914,610.82/66,422.56
  6. Step 6: Final answer
    x = 49,966.68

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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.