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Finding the Fourth Proportional to 128,355, 192,610.26 and 54,483

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Solution

The fourth proportional to 128,355, 192,610.26 and 54,483 is: 81,757.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,355 : 192,610.26 = 54,483 : x
  2. Step 2: Convert to fraction form
    128,355/192,610.26 = 54,483/x
  3. Step 3: Cross multiply
    128,355x = 192,610.26 × 54,483
  4. Step 4: Simplify right side
    128,355x = 10,493,984,795.58
  5. Step 5: Solve for x
    x = 10,493,984,795.58/128,355
  6. Step 6: Final answer
    x = 81,757.51

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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.