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Finding the Fourth Proportional to 81,753.90, 122,958.90 and 73,224.60

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Solution

The fourth proportional to 81,753.90, 122,958.90 and 73,224.60 is: 110,130.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,753.90 : 122,958.90 = 73,224.60 : x
  2. Step 2: Convert to fraction form
    81,753.90/122,958.90 = 73,224.60/x
  3. Step 3: Cross multiply
    81,753.90x = 122,958.90 × 73,224.60
  4. Step 4: Simplify right side
    81,753.90x = 9,003,616,268.94
  5. Step 5: Solve for x
    x = 9,003,616,268.94/81,753.90
  6. Step 6: Final answer
    x = 110,130.72

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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.