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Finding the Fourth Proportional to 143.04, 213.72 and 136.32

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Solution

The fourth proportional to 143.04, 213.72 and 136.32 is: 203.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    143.04 : 213.72 = 136.32 : x
  2. Step 2: Convert to fraction form
    143.04/213.72 = 136.32/x
  3. Step 3: Cross multiply
    143.04x = 213.72 × 136.32
  4. Step 4: Simplify right side
    143.04x = 29,134.31
  5. Step 5: Solve for x
    x = 29,134.31/143.04
  6. Step 6: Final answer
    x = 203.68

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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.