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Finding the Fourth Proportional to 66,380.72, 91,604.56 and 36,167.32

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Solution

The fourth proportional to 66,380.72, 91,604.56 and 36,167.32 is: 49,910.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,380.72 : 91,604.56 = 36,167.32 : x
  2. Step 2: Convert to fraction form
    66,380.72/91,604.56 = 36,167.32/x
  3. Step 3: Cross multiply
    66,380.72x = 91,604.56 × 36,167.32
  4. Step 4: Simplify right side
    66,380.72x = 3,313,091,434.98
  5. Step 5: Solve for x
    x = 3,313,091,434.98/66,380.72
  6. Step 6: Final answer
    x = 49,910.45

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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.