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Finding the Fourth Proportional to 77,361.90, 115,845.90 and 50,986.68

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Solution

The fourth proportional to 77,361.90, 115,845.90 and 50,986.68 is: 76,350.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    77,361.90 : 115,845.90 = 50,986.68 : x
  2. Step 2: Convert to fraction form
    77,361.90/115,845.90 = 50,986.68/x
  3. Step 3: Cross multiply
    77,361.90x = 115,845.90 × 50,986.68
  4. Step 4: Simplify right side
    77,361.90x = 5,906,597,832.61
  5. Step 5: Solve for x
    x = 5,906,597,832.61/77,361.90
  6. Step 6: Final answer
    x = 76,350.22

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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.