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Finding the Fourth Proportional to 128,580.38, 192,752.44 and 44,320.54

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Solution

The fourth proportional to 128,580.38, 192,752.44 and 44,320.54 is: 66,440.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,580.38 : 192,752.44 = 44,320.54 : x
  2. Step 2: Convert to fraction form
    128,580.38/192,752.44 = 44,320.54/x
  3. Step 3: Cross multiply
    128,580.38x = 192,752.44 × 44,320.54
  4. Step 4: Simplify right side
    128,580.38x = 8,542,892,227.12
  5. Step 5: Solve for x
    x = 8,542,892,227.12/128,580.38
  6. Step 6: Final answer
    x = 66,440.09

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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.