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Finding the Fourth Proportional to 71,954.88, 99,297.48 and 40,122.96

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Solution

The fourth proportional to 71,954.88, 99,297.48 and 40,122.96 is: 55,369.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,954.88 : 99,297.48 = 40,122.96 : x
  2. Step 2: Convert to fraction form
    71,954.88/99,297.48 = 40,122.96/x
  3. Step 3: Cross multiply
    71,954.88x = 99,297.48 × 40,122.96
  4. Step 4: Simplify right side
    71,954.88x = 3,984,108,818.14
  5. Step 5: Solve for x
    x = 3,984,108,818.14/71,954.88
  6. Step 6: Final answer
    x = 55,369.54

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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.