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Finding the Fourth Proportional to 66,419.44, 91,657.20 and 36,205.60

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Solution

The fourth proportional to 66,419.44, 91,657.20 and 36,205.60 is: 49,962.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,419.44 : 91,657.20 = 36,205.60 : x
  2. Step 2: Convert to fraction form
    66,419.44/91,657.20 = 36,205.60/x
  3. Step 3: Cross multiply
    66,419.44x = 91,657.20 × 36,205.60
  4. Step 4: Simplify right side
    66,419.44x = 3,318,503,920.32
  5. Step 5: Solve for x
    x = 3,318,503,920.32/66,419.44
  6. Step 6: Final answer
    x = 49,962.84

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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.