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Finding the Fourth Proportional to 66,168.88, 91,278.82 and 40,974.64

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Solution

The fourth proportional to 66,168.88, 91,278.82 and 40,974.64 is: 56,523.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,168.88 : 91,278.82 = 40,974.64 : x
  2. Step 2: Convert to fraction form
    66,168.88/91,278.82 = 40,974.64/x
  3. Step 3: Cross multiply
    66,168.88x = 91,278.82 × 40,974.64
  4. Step 4: Simplify right side
    66,168.88x = 3,740,116,789.12
  5. Step 5: Solve for x
    x = 3,740,116,789.12/66,168.88
  6. Step 6: Final answer
    x = 56,523.80

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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.