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Finding the Fourth Proportional to 127,961.20, 192,028.20 and 71,801.20

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Solution

The fourth proportional to 127,961.20, 192,028.20 and 71,801.20 is: 107,750.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    127,961.20 : 192,028.20 = 71,801.20 : x
  2. Step 2: Convert to fraction form
    127,961.20/192,028.20 = 71,801.20/x
  3. Step 3: Cross multiply
    127,961.20x = 192,028.20 × 71,801.20
  4. Step 4: Simplify right side
    127,961.20x = 13,787,855,193.84
  5. Step 5: Solve for x
    x = 13,787,855,193.84/127,961.20
  6. Step 6: Final answer
    x = 107,750.28

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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.