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Finding the Fourth Proportional to 143.43, 214.23 and 135.54

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Solution

The fourth proportional to 143.43, 214.23 and 135.54 is: 202.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    143.43 : 214.23 = 135.54 : x
  2. Step 2: Convert to fraction form
    143.43/214.23 = 135.54/x
  3. Step 3: Cross multiply
    143.43x = 214.23 × 135.54
  4. Step 4: Simplify right side
    143.43x = 29,036.73
  5. Step 5: Solve for x
    x = 29,036.73/143.43
  6. Step 6: Final answer
    x = 202.45

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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.