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Finding the Fourth Proportional to 66,287.80, 99,188.70 and 48,791.80

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Solution

The fourth proportional to 66,287.80, 99,188.70 and 48,791.80 is: 73,008.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,287.80 : 99,188.70 = 48,791.80 : x
  2. Step 2: Convert to fraction form
    66,287.80/99,188.70 = 48,791.80/x
  3. Step 3: Cross multiply
    66,287.80x = 99,188.70 × 48,791.80
  4. Step 4: Simplify right side
    66,287.80x = 4,839,595,212.66
  5. Step 5: Solve for x
    x = 4,839,595,212.66/66,287.80
  6. Step 6: Final answer
    x = 73,008.84

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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.