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Finding the Fourth Proportional to 71,843.60, 99,144.06 and 40,015.28

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Solution

The fourth proportional to 71,843.60, 99,144.06 and 40,015.28 is: 55,221.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,843.60 : 99,144.06 = 40,015.28 : x
  2. Step 2: Convert to fraction form
    71,843.60/99,144.06 = 40,015.28/x
  3. Step 3: Cross multiply
    71,843.60x = 99,144.06 × 40,015.28
  4. Step 4: Simplify right side
    71,843.60x = 3,967,277,321.24
  5. Step 5: Solve for x
    x = 3,967,277,321.24/71,843.60
  6. Step 6: Final answer
    x = 55,221.03

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.