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Finding the Fourth Proportional to 200,391.27, 276,727.28 and 128,895.41

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Solution

The fourth proportional to 200,391.27, 276,727.28 and 128,895.41 is: 177,996.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    200,391.27 : 276,727.28 = 128,895.41 : x
  2. Step 2: Convert to fraction form
    200,391.27/276,727.28 = 128,895.41/x
  3. Step 3: Cross multiply
    200,391.27x = 276,727.28 × 128,895.41
  4. Step 4: Simplify right side
    200,391.27x = 35,668,874,185.67
  5. Step 5: Solve for x
    x = 35,668,874,185.67/200,391.27
  6. Step 6: Final answer
    x = 177,996.15

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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.