Home / 128,481.03-192,720.47-100,424.69

Finding the Fourth Proportional to 128,481.03, 192,720.47 and 100,424.69

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Solution

The fourth proportional to 128,481.03, 192,720.47 and 100,424.69 is: 150,636.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,481.03 : 192,720.47 = 100,424.69 : x
  2. Step 2: Convert to fraction form
    128,481.03/192,720.47 = 100,424.69/x
  3. Step 3: Cross multiply
    128,481.03x = 192,720.47 × 100,424.69
  4. Step 4: Simplify right side
    128,481.03x = 19,353,891,990.68
  5. Step 5: Solve for x
    x = 19,353,891,990.68/128,481.03
  6. Step 6: Final answer
    x = 150,636.18

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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.