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Finding the Fourth Proportional to 93.98, 140.37 and 80.31

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Solution

The fourth proportional to 93.98, 140.37 and 80.31 is: 119.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    93.98 : 140.37 = 80.31 : x
  2. Step 2: Convert to fraction form
    93.98/140.37 = 80.31/x
  3. Step 3: Cross multiply
    93.98x = 140.37 × 80.31
  4. Step 4: Simplify right side
    93.98x = 11,273.11
  5. Step 5: Solve for x
    x = 11,273.11/93.98
  6. Step 6: Final answer
    x = 119.95

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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.