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Finding the Fourth Proportional to 66,445.64, 91,691.61 and 36,230.71

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Solution

The fourth proportional to 66,445.64, 91,691.61 and 36,230.71 is: 49,996.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,445.64 : 91,691.61 = 36,230.71 : x
  2. Step 2: Convert to fraction form
    66,445.64/91,691.61 = 36,230.71/x
  3. Step 3: Cross multiply
    66,445.64x = 91,691.61 × 36,230.71
  4. Step 4: Simplify right side
    66,445.64x = 3,322,052,131.34
  5. Step 5: Solve for x
    x = 3,322,052,131.34/66,445.64
  6. Step 6: Final answer
    x = 49,996.54

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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.