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Finding the Fourth Proportional to 147.33, 203.31 and 80.94

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Solution

The fourth proportional to 147.33, 203.31 and 80.94 is: 111.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    147.33 : 203.31 = 80.94 : x
  2. Step 2: Convert to fraction form
    147.33/203.31 = 80.94/x
  3. Step 3: Cross multiply
    147.33x = 203.31 × 80.94
  4. Step 4: Simplify right side
    147.33x = 16,455.91
  5. Step 5: Solve for x
    x = 16,455.91/147.33
  6. Step 6: Final answer
    x = 111.69

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.