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Finding the Fourth Proportional to 201,063.11, 277,397.72 and 128,508.48

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Solution

The fourth proportional to 201,063.11, 277,397.72 and 128,508.48 is: 177,297.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    201,063.11 : 277,397.72 = 128,508.48 : x
  2. Step 2: Convert to fraction form
    201,063.11/277,397.72 = 128,508.48/x
  3. Step 3: Cross multiply
    201,063.11x = 277,397.72 × 128,508.48
  4. Step 4: Simplify right side
    201,063.11x = 35,647,958,710.12
  5. Step 5: Solve for x
    x = 35,647,958,710.12/201,063.11
  6. Step 6: Final answer
    x = 177,297.36

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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.