Home / 135,684.69-187,266.42-81,977.43

Finding the Fourth Proportional to 135,684.69, 187,266.42 and 81,977.43

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Solution

The fourth proportional to 135,684.69, 187,266.42 and 81,977.43 is: 113,141.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    135,684.69 : 187,266.42 = 81,977.43 : x
  2. Step 2: Convert to fraction form
    135,684.69/187,266.42 = 81,977.43/x
  3. Step 3: Cross multiply
    135,684.69x = 187,266.42 × 81,977.43
  4. Step 4: Simplify right side
    135,684.69x = 15,351,619,836.90
  5. Step 5: Solve for x
    x = 15,351,619,836.90/135,684.69
  6. Step 6: Final answer
    x = 113,141.87

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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.