Home / 135,305.34-186,716.78-74,878.53

Finding the Fourth Proportional to 135,305.34, 186,716.78 and 74,878.53

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Solution

The fourth proportional to 135,305.34, 186,716.78 and 74,878.53 is: 103,329.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    135,305.34 : 186,716.78 = 74,878.53 : x
  2. Step 2: Convert to fraction form
    135,305.34/186,716.78 = 74,878.53/x
  3. Step 3: Cross multiply
    135,305.34x = 186,716.78 × 74,878.53
  4. Step 4: Simplify right side
    135,305.34x = 13,981,078,012.73
  5. Step 5: Solve for x
    x = 13,981,078,012.73/135,305.34
  6. Step 6: Final answer
    x = 103,329.83

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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.