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Finding the Fourth Proportional to 141.33, 210.74 and 136.87

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Solution

The fourth proportional to 141.33, 210.74 and 136.87 is: 204.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    141.33 : 210.74 = 136.87 : x
  2. Step 2: Convert to fraction form
    141.33/210.74 = 136.87/x
  3. Step 3: Cross multiply
    141.33x = 210.74 × 136.87
  4. Step 4: Simplify right side
    141.33x = 28,843.98
  5. Step 5: Solve for x
    x = 28,843.98/141.33
  6. Step 6: Final answer
    x = 204.09

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.