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Finding the Fourth Proportional to 192,087.40, 287,958.30 and 121,930.60

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Solution

The fourth proportional to 192,087.40, 287,958.30 and 121,930.60 is: 182,786.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    192,087.40 : 287,958.30 = 121,930.60 : x
  2. Step 2: Convert to fraction form
    192,087.40/287,958.30 = 121,930.60/x
  3. Step 3: Cross multiply
    192,087.40x = 287,958.30 × 121,930.60
  4. Step 4: Simplify right side
    192,087.40x = 35,110,928,293.98
  5. Step 5: Solve for x
    x = 35,110,928,293.98/192,087.40
  6. Step 6: Final answer
    x = 182,786.21

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.