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Finding the Fourth Proportional to 93.29, 140.09 and 81.23

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Solution

The fourth proportional to 93.29, 140.09 and 81.23 is: 121.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    93.29 : 140.09 = 81.23 : x
  2. Step 2: Convert to fraction form
    93.29/140.09 = 81.23/x
  3. Step 3: Cross multiply
    93.29x = 140.09 × 81.23
  4. Step 4: Simplify right side
    93.29x = 11,378.40
  5. Step 5: Solve for x
    x = 11,378.40/93.29
  6. Step 6: Final answer
    x = 121.97

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.