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Finding the Fourth Proportional to 66,321.08, 91,520.10 and 36,105.63

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Solution

The fourth proportional to 66,321.08, 91,520.10 and 36,105.63 is: 49,824.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,321.08 : 91,520.10 = 36,105.63 : x
  2. Step 2: Convert to fraction form
    66,321.08/91,520.10 = 36,105.63/x
  3. Step 3: Cross multiply
    66,321.08x = 91,520.10 × 36,105.63
  4. Step 4: Simplify right side
    66,321.08x = 3,304,390,868.16
  5. Step 5: Solve for x
    x = 3,304,390,868.16/66,321.08
  6. Step 6: Final answer
    x = 49,824.14

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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.