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Finding the Fourth Proportional to 140.36, 211.63 and 131.08

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Solution

The fourth proportional to 140.36, 211.63 and 131.08 is: 197.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    140.36 : 211.63 = 131.08 : x
  2. Step 2: Convert to fraction form
    140.36/211.63 = 131.08/x
  3. Step 3: Cross multiply
    140.36x = 211.63 × 131.08
  4. Step 4: Simplify right side
    140.36x = 27,740.46
  5. Step 5: Solve for x
    x = 27,740.46/140.36
  6. Step 6: Final answer
    x = 197.64

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Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.