Home / 135,786.78-187,408.28-79,198.16

Finding the Fourth Proportional to 135,786.78, 187,408.28 and 79,198.16

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Solution

The fourth proportional to 135,786.78, 187,408.28 and 79,198.16 is: 109,306.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    135,786.78 : 187,408.28 = 79,198.16 : x
  2. Step 2: Convert to fraction form
    135,786.78/187,408.28 = 79,198.16/x
  3. Step 3: Cross multiply
    135,786.78x = 187,408.28 × 79,198.16
  4. Step 4: Simplify right side
    135,786.78x = 14,842,390,205.72
  5. Step 5: Solve for x
    x = 14,842,390,205.72/135,786.78
  6. Step 6: Final answer
    x = 109,306.59

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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.