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Finding the Fourth Proportional to 66,404.12, 91,635.01 and 36,188.80

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Solution

The fourth proportional to 66,404.12, 91,635.01 and 36,188.80 is: 49,939.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,404.12 : 91,635.01 = 36,188.80 : x
  2. Step 2: Convert to fraction form
    66,404.12/91,635.01 = 36,188.80/x
  3. Step 3: Cross multiply
    66,404.12x = 91,635.01 × 36,188.80
  4. Step 4: Simplify right side
    66,404.12x = 3,316,160,591.71
  5. Step 5: Solve for x
    x = 3,316,160,591.71/66,404.12
  6. Step 6: Final answer
    x = 49,939.08

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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.