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Finding the Fourth Proportional to 81,863.64, 122,664.33 and 73,990.44

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Solution

The fourth proportional to 81,863.64, 122,664.33 and 73,990.44 is: 110,867.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,863.64 : 122,664.33 = 73,990.44 : x
  2. Step 2: Convert to fraction form
    81,863.64/122,664.33 = 73,990.44/x
  3. Step 3: Cross multiply
    81,863.64x = 122,664.33 × 73,990.44
  4. Step 4: Simplify right side
    81,863.64x = 9,075,987,749.01
  5. Step 5: Solve for x
    x = 9,075,987,749.01/81,863.64
  6. Step 6: Final answer
    x = 110,867.14

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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.