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Finding the Fourth Proportional to 102.26, 140.91 and 73.10

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Solution

The fourth proportional to 102.26, 140.91 and 73.10 is: 100.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    102.26 : 140.91 = 73.10 : x
  2. Step 2: Convert to fraction form
    102.26/140.91 = 73.10/x
  3. Step 3: Cross multiply
    102.26x = 140.91 × 73.10
  4. Step 4: Simplify right side
    102.26x = 10,299.82
  5. Step 5: Solve for x
    x = 10,299.82/102.26
  6. Step 6: Final answer
    x = 100.73

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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.