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Finding the Fourth Proportional to 199,914.73, 275,855.70 and 128,391.64

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Solution

The fourth proportional to 199,914.73, 275,855.70 and 128,391.64 is: 177,163.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    199,914.73 : 275,855.70 = 128,391.64 : x
  2. Step 2: Convert to fraction form
    199,914.73/275,855.70 = 128,391.64/x
  3. Step 3: Cross multiply
    199,914.73x = 275,855.70 × 128,391.64
  4. Step 4: Simplify right side
    199,914.73x = 35,417,565,726.35
  5. Step 5: Solve for x
    x = 35,417,565,726.35/199,914.73
  6. Step 6: Final answer
    x = 177,163.36

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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.