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Finding the Fourth Proportional to 111,892.80, 167,968.80 and 67,569.60

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Solution

The fourth proportional to 111,892.80, 167,968.80 and 67,569.60 is: 101,432.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    111,892.80 : 167,968.80 = 67,569.60 : x
  2. Step 2: Convert to fraction form
    111,892.80/167,968.80 = 67,569.60/x
  3. Step 3: Cross multiply
    111,892.80x = 167,968.80 × 67,569.60
  4. Step 4: Simplify right side
    111,892.80x = 11,349,584,628.48
  5. Step 5: Solve for x
    x = 11,349,584,628.48/111,892.80
  6. Step 6: Final answer
    x = 101,432.66

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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.