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Finding the Fourth Proportional to 66,356.40, 99,534.60 and 19,608.60

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Solution

The fourth proportional to 66,356.40, 99,534.60 and 19,608.60 is: 29,412.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,356.40 : 99,534.60 = 19,608.60 : x
  2. Step 2: Convert to fraction form
    66,356.40/99,534.60 = 19,608.60/x
  3. Step 3: Cross multiply
    66,356.40x = 99,534.60 × 19,608.60
  4. Step 4: Simplify right side
    66,356.40x = 1,951,734,157.56
  5. Step 5: Solve for x
    x = 1,951,734,157.56/66,356.40
  6. Step 6: Final answer
    x = 29,412.90

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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.