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Finding the Fourth Proportional to 66,449.60, 99,693.60 and 19,703.60

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Solution

The fourth proportional to 66,449.60, 99,693.60 and 19,703.60 is: 29,561.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,449.60 : 99,693.60 = 19,703.60 : x
  2. Step 2: Convert to fraction form
    66,449.60/99,693.60 = 19,703.60/x
  3. Step 3: Cross multiply
    66,449.60x = 99,693.60 × 19,703.60
  4. Step 4: Simplify right side
    66,449.60x = 1,964,322,816.96
  5. Step 5: Solve for x
    x = 1,964,322,816.96/66,449.60
  6. Step 6: Final answer
    x = 29,561.09

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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.