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Finding the Fourth Proportional to 66,391.68, 91,619.35 and 36,177.22

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Solution

The fourth proportional to 66,391.68, 91,619.35 and 36,177.22 is: 49,923.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,391.68 : 91,619.35 = 36,177.22 : x
  2. Step 2: Convert to fraction form
    66,391.68/91,619.35 = 36,177.22/x
  3. Step 3: Cross multiply
    66,391.68x = 91,619.35 × 36,177.22
  4. Step 4: Simplify right side
    66,391.68x = 3,314,533,381.21
  5. Step 5: Solve for x
    x = 3,314,533,381.21/66,391.68
  6. Step 6: Final answer
    x = 49,923.93

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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.