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Finding the Fourth Proportional to 66,422.18, 91,662.72 and 36,207.74

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Solution

The fourth proportional to 66,422.18, 91,662.72 and 36,207.74 is: 49,966.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,422.18 : 91,662.72 = 36,207.74 : x
  2. Step 2: Convert to fraction form
    66,422.18/91,662.72 = 36,207.74/x
  3. Step 3: Cross multiply
    66,422.18x = 91,662.72 × 36,207.74
  4. Step 4: Simplify right side
    66,422.18x = 3,318,899,933.45
  5. Step 5: Solve for x
    x = 3,318,899,933.45/66,422.18
  6. Step 6: Final answer
    x = 49,966.74

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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.