Home / 135,824.51-187,428.71-82,139.12

Finding the Fourth Proportional to 135,824.51, 187,428.71 and 82,139.12

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Solution

The fourth proportional to 135,824.51, 187,428.71 and 82,139.12 is: 113,346.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    135,824.51 : 187,428.71 = 82,139.12 : x
  2. Step 2: Convert to fraction form
    135,824.51/187,428.71 = 82,139.12/x
  3. Step 3: Cross multiply
    135,824.51x = 187,428.71 × 82,139.12
  4. Step 4: Simplify right side
    135,824.51x = 15,395,228,891.44
  5. Step 5: Solve for x
    x = 15,395,228,891.44/135,824.51
  6. Step 6: Final answer
    x = 113,346.48

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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.