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Finding the Fourth Proportional to 128,748.67, 193,086.09 and 38,800.09

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Solution

The fourth proportional to 128,748.67, 193,086.09 and 38,800.09 is: 58,189.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,748.67 : 193,086.09 = 38,800.09 : x
  2. Step 2: Convert to fraction form
    128,748.67/193,086.09 = 38,800.09/x
  3. Step 3: Cross multiply
    128,748.67x = 193,086.09 × 38,800.09
  4. Step 4: Simplify right side
    128,748.67x = 7,491,757,669.75
  5. Step 5: Solve for x
    x = 7,491,757,669.75/128,748.67
  6. Step 6: Final answer
    x = 58,189.01

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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.