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Finding the Fourth Proportional to 81,361.72, 122,060.98 and 43,920.98

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Solution

The fourth proportional to 81,361.72, 122,060.98 and 43,920.98 is: 65,891.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,361.72 : 122,060.98 = 43,920.98 : x
  2. Step 2: Convert to fraction form
    81,361.72/122,060.98 = 43,920.98/x
  3. Step 3: Cross multiply
    81,361.72x = 122,060.98 × 43,920.98
  4. Step 4: Simplify right side
    81,361.72x = 5,361,038,203.22
  5. Step 5: Solve for x
    x = 5,361,038,203.22/81,361.72
  6. Step 6: Final answer
    x = 65,891.41

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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.