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Finding the Fourth Proportional to 207,243.48, 310,865.22 and 74,115.66

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Solution

The fourth proportional to 207,243.48, 310,865.22 and 74,115.66 is: 111,173.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    207,243.48 : 310,865.22 = 74,115.66 : x
  2. Step 2: Convert to fraction form
    207,243.48/310,865.22 = 74,115.66/x
  3. Step 3: Cross multiply
    207,243.48x = 310,865.22 × 74,115.66
  4. Step 4: Simplify right side
    207,243.48x = 23,039,980,951.35
  5. Step 5: Solve for x
    x = 23,039,980,951.35/207,243.48
  6. Step 6: Final answer
    x = 111,173.49

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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.