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Finding the Fourth Proportional to 71,921.44, 99,250.17 and 40,088.44

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Solution

The fourth proportional to 71,921.44, 99,250.17 and 40,088.44 is: 55,321.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,921.44 : 99,250.17 = 40,088.44 : x
  2. Step 2: Convert to fraction form
    71,921.44/99,250.17 = 40,088.44/x
  3. Step 3: Cross multiply
    71,921.44x = 99,250.17 × 40,088.44
  4. Step 4: Simplify right side
    71,921.44x = 3,978,784,485.03
  5. Step 5: Solve for x
    x = 3,978,784,485.03/71,921.44
  6. Step 6: Final answer
    x = 55,321.26

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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.