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Finding the Fourth Proportional to 199,871.88, 275,796.66 and 128,348.88

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Solution

The fourth proportional to 199,871.88, 275,796.66 and 128,348.88 is: 177,104.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    199,871.88 : 275,796.66 = 128,348.88 : x
  2. Step 2: Convert to fraction form
    199,871.88/275,796.66 = 128,348.88/x
  3. Step 3: Cross multiply
    199,871.88x = 275,796.66 × 128,348.88
  4. Step 4: Simplify right side
    199,871.88x = 35,398,192,418.74
  5. Step 5: Solve for x
    x = 35,398,192,418.74/199,871.88
  6. Step 6: Final answer
    x = 177,104.42

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.