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Finding the Fourth Proportional to 73,991.44, 111,003.90 and 21,405.16

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Solution

The fourth proportional to 73,991.44, 111,003.90 and 21,405.16 is: 32,112.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    73,991.44 : 111,003.90 = 21,405.16 : x
  2. Step 2: Convert to fraction form
    73,991.44/111,003.90 = 21,405.16/x
  3. Step 3: Cross multiply
    73,991.44x = 111,003.90 × 21,405.16
  4. Step 4: Simplify right side
    73,991.44x = 2,376,056,240.12
  5. Step 5: Solve for x
    x = 2,376,056,240.12/73,991.44
  6. Step 6: Final answer
    x = 32,112.58

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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.