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Finding the Fourth Proportional to 66,391.45, 91,619.02 and 36,177.03

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Solution

The fourth proportional to 66,391.45, 91,619.02 and 36,177.03 is: 49,923.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,391.45 : 91,619.02 = 36,177.03 : x
  2. Step 2: Convert to fraction form
    66,391.45/91,619.02 = 36,177.03/x
  3. Step 3: Cross multiply
    66,391.45x = 91,619.02 × 36,177.03
  4. Step 4: Simplify right side
    66,391.45x = 3,314,504,173.72
  5. Step 5: Solve for x
    x = 3,314,504,173.72/66,391.45
  6. Step 6: Final answer
    x = 49,923.66

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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.