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Finding the Fourth Proportional to 140.69, 211.99 and 125.95

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Solution

The fourth proportional to 140.69, 211.99 and 125.95 is: 189.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    140.69 : 211.99 = 125.95 : x
  2. Step 2: Convert to fraction form
    140.69/211.99 = 125.95/x
  3. Step 3: Cross multiply
    140.69x = 211.99 × 125.95
  4. Step 4: Simplify right side
    140.69x = 26,700.14
  5. Step 5: Solve for x
    x = 26,700.14/140.69
  6. Step 6: Final answer
    x = 189.78

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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.