Home / 135,163.09-186,508.78-74,725.57

Finding the Fourth Proportional to 135,163.09, 186,508.78 and 74,725.57

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Solution

The fourth proportional to 135,163.09, 186,508.78 and 74,725.57 is: 103,112.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    135,163.09 : 186,508.78 = 74,725.57 : x
  2. Step 2: Convert to fraction form
    135,163.09/186,508.78 = 74,725.57/x
  3. Step 3: Cross multiply
    135,163.09x = 186,508.78 × 74,725.57
  4. Step 4: Simplify right side
    135,163.09x = 13,936,974,895.50
  5. Step 5: Solve for x
    x = 13,936,974,895.50/135,163.09
  6. Step 6: Final answer
    x = 103,112.28

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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.