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Finding the Fourth Proportional to 111,238.60, 166,784.20 and 61,342.60

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Solution

The fourth proportional to 111,238.60, 166,784.20 and 61,342.60 is: 91,973.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    111,238.60 : 166,784.20 = 61,342.60 : x
  2. Step 2: Convert to fraction form
    111,238.60/166,784.20 = 61,342.60/x
  3. Step 3: Cross multiply
    111,238.60x = 166,784.20 × 61,342.60
  4. Step 4: Simplify right side
    111,238.60x = 10,230,976,466.92
  5. Step 5: Solve for x
    x = 10,230,976,466.92/111,238.60
  6. Step 6: Final answer
    x = 91,973.26

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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.