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Finding the Fourth Proportional to 140.36, 210.72 and 94.91

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Solution

The fourth proportional to 140.36, 210.72 and 94.91 is: 142.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    140.36 : 210.72 = 94.91 : x
  2. Step 2: Convert to fraction form
    140.36/210.72 = 94.91/x
  3. Step 3: Cross multiply
    140.36x = 210.72 × 94.91
  4. Step 4: Simplify right side
    140.36x = 19,999.44
  5. Step 5: Solve for x
    x = 19,999.44/140.36
  6. Step 6: Final answer
    x = 142.49

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.