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Finding the Fourth Proportional to 93.82, 140.41 and 74.40

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Solution

The fourth proportional to 93.82, 140.41 and 74.40 is: 111.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    93.82 : 140.41 = 74.40 : x
  2. Step 2: Convert to fraction form
    93.82/140.41 = 74.40/x
  3. Step 3: Cross multiply
    93.82x = 140.41 × 74.40
  4. Step 4: Simplify right side
    93.82x = 10,445.65
  5. Step 5: Solve for x
    x = 10,445.65/93.82
  6. Step 6: Final answer
    x = 111.34

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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.