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Finding the Fourth Proportional to 103.02, 142.10 and 82.27

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Solution

The fourth proportional to 103.02, 142.10 and 82.27 is: 113.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    103.02 : 142.10 = 82.27 : x
  2. Step 2: Convert to fraction form
    103.02/142.10 = 82.27/x
  3. Step 3: Cross multiply
    103.02x = 142.10 × 82.27
  4. Step 4: Simplify right side
    103.02x = 11,690.31
  5. Step 5: Solve for x
    x = 11,690.31/103.02
  6. Step 6: Final answer
    x = 113.47

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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.