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Finding the Fourth Proportional to 128,767.89, 193,114.88 and 38,819.37

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Solution

The fourth proportional to 128,767.89, 193,114.88 and 38,819.37 is: 58,217.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,767.89 : 193,114.88 = 38,819.37 : x
  2. Step 2: Convert to fraction form
    128,767.89/193,114.88 = 38,819.37/x
  3. Step 3: Cross multiply
    128,767.89x = 193,114.88 × 38,819.37
  4. Step 4: Simplify right side
    128,767.89x = 7,496,597,979.23
  5. Step 5: Solve for x
    x = 7,496,597,979.23/128,767.89
  6. Step 6: Final answer
    x = 58,217.91

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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.