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Finding the Fourth Proportional to 143.29, 215.99 and 134.93

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Solution

The fourth proportional to 143.29, 215.99 and 134.93 is: 203.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    143.29 : 215.99 = 134.93 : x
  2. Step 2: Convert to fraction form
    143.29/215.99 = 134.93/x
  3. Step 3: Cross multiply
    143.29x = 215.99 × 134.93
  4. Step 4: Simplify right side
    143.29x = 29,144.05
  5. Step 5: Solve for x
    x = 29,144.05/143.29
  6. Step 6: Final answer
    x = 203.39

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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.