Home / 135,644.34-187,144.38-81,908.94

Finding the Fourth Proportional to 135,644.34, 187,144.38 and 81,908.94

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Solution

The fourth proportional to 135,644.34, 187,144.38 and 81,908.94 is: 113,007.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    135,644.34 : 187,144.38 = 81,908.94 : x
  2. Step 2: Convert to fraction form
    135,644.34/187,144.38 = 81,908.94/x
  3. Step 3: Cross multiply
    135,644.34x = 187,144.38 × 81,908.94
  4. Step 4: Simplify right side
    135,644.34x = 15,328,797,792.76
  5. Step 5: Solve for x
    x = 15,328,797,792.76/135,644.34
  6. Step 6: Final answer
    x = 113,007.28

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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.