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Finding the Fourth Proportional to 66,186.78, 91,337.73 and 36,378.78

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Solution

The fourth proportional to 66,186.78, 91,337.73 and 36,378.78 is: 50,202.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,186.78 : 91,337.73 = 36,378.78 : x
  2. Step 2: Convert to fraction form
    66,186.78/91,337.73 = 36,378.78/x
  3. Step 3: Cross multiply
    66,186.78x = 91,337.73 × 36,378.78
  4. Step 4: Simplify right side
    66,186.78x = 3,322,755,185.37
  5. Step 5: Solve for x
    x = 3,322,755,185.37/66,186.78
  6. Step 6: Final answer
    x = 50,202.70

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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.