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Finding the Fourth Proportional to 200,979.84, 277,295.40 and 129,401.28

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Solution

The fourth proportional to 200,979.84, 277,295.40 and 129,401.28 is: 178,537.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    200,979.84 : 277,295.40 = 129,401.28 : x
  2. Step 2: Convert to fraction form
    200,979.84/277,295.40 = 129,401.28/x
  3. Step 3: Cross multiply
    200,979.84x = 277,295.40 × 129,401.28
  4. Step 4: Simplify right side
    200,979.84x = 35,882,379,698.11
  5. Step 5: Solve for x
    x = 35,882,379,698.11/200,979.84
  6. Step 6: Final answer
    x = 178,537.21

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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.