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Finding the Fourth Proportional to 128,654.39, 192,903.44 and 57,563.78

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Solution

The fourth proportional to 128,654.39, 192,903.44 and 57,563.78 is: 86,310.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,654.39 : 192,903.44 = 57,563.78 : x
  2. Step 2: Convert to fraction form
    128,654.39/192,903.44 = 57,563.78/x
  3. Step 3: Cross multiply
    128,654.39x = 192,903.44 × 57,563.78
  4. Step 4: Simplify right side
    128,654.39x = 11,104,251,337.95
  5. Step 5: Solve for x
    x = 11,104,251,337.95/128,654.39
  6. Step 6: Final answer
    x = 86,310.71

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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.