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Finding the Fourth Proportional to 128,540.30, 192,580.05 and 110,108.30

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Solution

The fourth proportional to 128,540.30, 192,580.05 and 110,108.30 is: 164,965.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,540.30 : 192,580.05 = 110,108.30 : x
  2. Step 2: Convert to fraction form
    128,540.30/192,580.05 = 110,108.30/x
  3. Step 3: Cross multiply
    128,540.30x = 192,580.05 × 110,108.30
  4. Step 4: Simplify right side
    128,540.30x = 21,204,661,919.42
  5. Step 5: Solve for x
    x = 21,204,661,919.42/128,540.30
  6. Step 6: Final answer
    x = 164,965.09

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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.