Home / 128,722.20-192,791.70-76,234.20

Finding the Fourth Proportional to 128,722.20, 192,791.70 and 76,234.20

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Solution

The fourth proportional to 128,722.20, 192,791.70 and 76,234.20 is: 114,178.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,722.20 : 192,791.70 = 76,234.20 : x
  2. Step 2: Convert to fraction form
    128,722.20/192,791.70 = 76,234.20/x
  3. Step 3: Cross multiply
    128,722.20x = 192,791.70 × 76,234.20
  4. Step 4: Simplify right side
    128,722.20x = 14,697,321,016.14
  5. Step 5: Solve for x
    x = 14,697,321,016.14/128,722.20
  6. Step 6: Final answer
    x = 114,178.60

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1.5x scale

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.