Home / 128,147.40-192,164.81-68,162.85

Finding the Fourth Proportional to 128,147.40, 192,164.81 and 68,162.85

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Solution

The fourth proportional to 128,147.40, 192,164.81 and 68,162.85 is: 102,214.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,147.40 : 192,164.81 = 68,162.85 : x
  2. Step 2: Convert to fraction form
    128,147.40/192,164.81 = 68,162.85/x
  3. Step 3: Cross multiply
    128,147.40x = 192,164.81 × 68,162.85
  4. Step 4: Simplify right side
    128,147.40x = 13,098,500,778.49
  5. Step 5: Solve for x
    x = 13,098,500,778.49/128,147.40
  6. Step 6: Final answer
    x = 102,214.33

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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.