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Finding the Fourth Proportional to 201,548.82, 277,839.21 and 128,943.87

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Solution

The fourth proportional to 201,548.82, 277,839.21 and 128,943.87 is: 177,751.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    201,548.82 : 277,839.21 = 128,943.87 : x
  2. Step 2: Convert to fraction form
    201,548.82/277,839.21 = 128,943.87/x
  3. Step 3: Cross multiply
    201,548.82x = 277,839.21 × 128,943.87
  4. Step 4: Simplify right side
    201,548.82x = 35,825,662,975.14
  5. Step 5: Solve for x
    x = 35,825,662,975.14/201,548.82
  6. Step 6: Final answer
    x = 177,751.79

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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.