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Finding the Fourth Proportional to 154.43, 211.92 and 140.51

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Solution

The fourth proportional to 154.43, 211.92 and 140.51 is: 192.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    154.43 : 211.92 = 140.51 : x
  2. Step 2: Convert to fraction form
    154.43/211.92 = 140.51/x
  3. Step 3: Cross multiply
    154.43x = 211.92 × 140.51
  4. Step 4: Simplify right side
    154.43x = 29,775.65
  5. Step 5: Solve for x
    x = 29,775.65/154.43
  6. Step 6: Final answer
    x = 192.81

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Why These Related Problems?

These problems maintain the same ratio (1.37) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.