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Finding the Fourth Proportional to 67,361.81, 100,976.69 and 57,389.09

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Solution

The fourth proportional to 67,361.81, 100,976.69 and 57,389.09 is: 86,027.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    67,361.81 : 100,976.69 = 57,389.09 : x
  2. Step 2: Convert to fraction form
    67,361.81/100,976.69 = 57,389.09/x
  3. Step 3: Cross multiply
    67,361.81x = 100,976.69 × 57,389.09
  4. Step 4: Simplify right side
    67,361.81x = 5,794,959,988.90
  5. Step 5: Solve for x
    x = 5,794,959,988.90/67,361.81
  6. Step 6: Final answer
    x = 86,027.39

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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.