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Finding the Fourth Proportional to 170,662.61, 255,786.39 and 120,757.11

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Solution

The fourth proportional to 170,662.61, 255,786.39 and 120,757.11 is: 180,988.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    170,662.61 : 255,786.39 = 120,757.11 : x
  2. Step 2: Convert to fraction form
    170,662.61/255,786.39 = 120,757.11/x
  3. Step 3: Cross multiply
    170,662.61x = 255,786.39 × 120,757.11
  4. Step 4: Simplify right side
    170,662.61x = 30,888,025,233.73
  5. Step 5: Solve for x
    x = 30,888,025,233.73/170,662.61
  6. Step 6: Final answer
    x = 180,988.83

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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.