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Finding the Fourth Proportional to 66,086.80, 99,120.60 and 19,334.80

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Solution

The fourth proportional to 66,086.80, 99,120.60 and 19,334.80 is: 28,999.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,086.80 : 99,120.60 = 19,334.80 : x
  2. Step 2: Convert to fraction form
    66,086.80/99,120.60 = 19,334.80/x
  3. Step 3: Cross multiply
    66,086.80x = 99,120.60 × 19,334.80
  4. Step 4: Simplify right side
    66,086.80x = 1,916,476,976.88
  5. Step 5: Solve for x
    x = 1,916,476,976.88/66,086.80
  6. Step 6: Final answer
    x = 28,999.39

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.