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Finding the Fourth Proportional to 81,864.64, 122,665.83 and 73,991.44

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Solution

The fourth proportional to 81,864.64, 122,665.83 and 73,991.44 is: 110,868.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,864.64 : 122,665.83 = 73,991.44 : x
  2. Step 2: Convert to fraction form
    81,864.64/122,665.83 = 73,991.44/x
  3. Step 3: Cross multiply
    81,864.64x = 122,665.83 × 73,991.44
  4. Step 4: Simplify right side
    81,864.64x = 9,076,221,400.50
  5. Step 5: Solve for x
    x = 9,076,221,400.50/81,864.64
  6. Step 6: Final answer
    x = 110,868.64

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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.