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Finding the Fourth Proportional to 107,468.80, 161,203.20 and 74,291.20

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Solution

The fourth proportional to 107,468.80, 161,203.20 and 74,291.20 is: 111,436.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    107,468.80 : 161,203.20 = 74,291.20 : x
  2. Step 2: Convert to fraction form
    107,468.80/161,203.20 = 74,291.20/x
  3. Step 3: Cross multiply
    107,468.80x = 161,203.20 × 74,291.20
  4. Step 4: Simplify right side
    107,468.80x = 11,975,979,171.84
  5. Step 5: Solve for x
    x = 11,975,979,171.84/107,468.80
  6. Step 6: Final answer
    x = 111,436.80

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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.