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Finding the Fourth Proportional to 66,422.31, 91,662.80 and 36,207.60

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Solution

The fourth proportional to 66,422.31, 91,662.80 and 36,207.60 is: 49,966.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,422.31 : 91,662.80 = 36,207.60 : x
  2. Step 2: Convert to fraction form
    66,422.31/91,662.80 = 36,207.60/x
  3. Step 3: Cross multiply
    66,422.31x = 91,662.80 × 36,207.60
  4. Step 4: Simplify right side
    66,422.31x = 3,318,889,997.28
  5. Step 5: Solve for x
    x = 3,318,889,997.28/66,422.31
  6. Step 6: Final answer
    x = 49,966.49

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1.5x scale

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.