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Finding the Fourth Proportional to 98,791.56, 136,331.28 and 53,469.36

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Solution

The fourth proportional to 98,791.56, 136,331.28 and 53,469.36 is: 73,787.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    98,791.56 : 136,331.28 = 53,469.36 : x
  2. Step 2: Convert to fraction form
    98,791.56/136,331.28 = 53,469.36/x
  3. Step 3: Cross multiply
    98,791.56x = 136,331.28 × 53,469.36
  4. Step 4: Simplify right side
    98,791.56x = 7,289,546,289.58
  5. Step 5: Solve for x
    x = 7,289,546,289.58/98,791.56
  6. Step 6: Final answer
    x = 73,787.14

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.