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Finding the Fourth Proportional to 128,213.20, 192,262.20 and 49,301.20

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Solution

The fourth proportional to 128,213.20, 192,262.20 and 49,301.20 is: 73,929.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,213.20 : 192,262.20 = 49,301.20 : x
  2. Step 2: Convert to fraction form
    128,213.20/192,262.20 = 49,301.20/x
  3. Step 3: Cross multiply
    128,213.20x = 192,262.20 × 49,301.20
  4. Step 4: Simplify right side
    128,213.20x = 9,478,757,174.64
  5. Step 5: Solve for x
    x = 9,478,757,174.64/128,213.20
  6. Step 6: Final answer
    x = 73,929.65

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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.