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Finding the Fourth Proportional to 105,194.40, 157,791.60 and 81,693.60

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Solution

The fourth proportional to 105,194.40, 157,791.60 and 81,693.60 is: 122,540.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    105,194.40 : 157,791.60 = 81,693.60 : x
  2. Step 2: Convert to fraction form
    105,194.40/157,791.60 = 81,693.60/x
  3. Step 3: Cross multiply
    105,194.40x = 157,791.60 × 81,693.60
  4. Step 4: Simplify right side
    105,194.40x = 12,890,563,853.76
  5. Step 5: Solve for x
    x = 12,890,563,853.76/105,194.40
  6. Step 6: Final answer
    x = 122,540.40

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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.