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Finding the Fourth Proportional to 128,241.80, 192,132.30 and 109,809.80

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Solution

The fourth proportional to 128,241.80, 192,132.30 and 109,809.80 is: 164,517.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,241.80 : 192,132.30 = 109,809.80 : x
  2. Step 2: Convert to fraction form
    128,241.80/192,132.30 = 109,809.80/x
  3. Step 3: Cross multiply
    128,241.80x = 192,132.30 × 109,809.80
  4. Step 4: Simplify right side
    128,241.80x = 21,098,009,436.54
  5. Step 5: Solve for x
    x = 21,098,009,436.54/128,241.80
  6. Step 6: Final answer
    x = 164,517.42

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1.5x scale

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.