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Finding the Fourth Proportional to 135,344.50, 186,770.73 and 74,917.78

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Solution

The fourth proportional to 135,344.50, 186,770.73 and 74,917.78 is: 103,383.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    135,344.50 : 186,770.73 = 74,917.78 : x
  2. Step 2: Convert to fraction form
    135,344.50/186,770.73 = 74,917.78/x
  3. Step 3: Cross multiply
    135,344.50x = 186,770.73 × 74,917.78
  4. Step 4: Simplify right side
    135,344.50x = 13,992,448,460.58
  5. Step 5: Solve for x
    x = 13,992,448,460.58/135,344.50
  6. Step 6: Final answer
    x = 103,383.95

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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.