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Finding the Fourth Proportional to 73,243.36, 109,923.20 and 28,881.28

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Solution

The fourth proportional to 73,243.36, 109,923.20 and 28,881.28 is: 43,344.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    73,243.36 : 109,923.20 = 28,881.28 : x
  2. Step 2: Convert to fraction form
    73,243.36/109,923.20 = 28,881.28/x
  3. Step 3: Cross multiply
    73,243.36x = 109,923.20 × 28,881.28
  4. Step 4: Simplify right side
    73,243.36x = 3,174,722,717.70
  5. Step 5: Solve for x
    x = 3,174,722,717.70/73,243.36
  6. Step 6: Final answer
    x = 43,344.85

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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.