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Finding the Fourth Proportional to 94.10, 140.40 and 92.03

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Solution

The fourth proportional to 94.10, 140.40 and 92.03 is: 137.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    94.10 : 140.40 = 92.03 : x
  2. Step 2: Convert to fraction form
    94.10/140.40 = 92.03/x
  3. Step 3: Cross multiply
    94.10x = 140.40 × 92.03
  4. Step 4: Simplify right side
    94.10x = 12,920.31
  5. Step 5: Solve for x
    x = 12,920.31/94.10
  6. Step 6: Final answer
    x = 137.31

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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.