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Finding the Fourth Proportional to 105.40, 144.11 and 102.52

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Solution

The fourth proportional to 105.40, 144.11 and 102.52 is: 140.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    105.40 : 144.11 = 102.52 : x
  2. Step 2: Convert to fraction form
    105.40/144.11 = 102.52/x
  3. Step 3: Cross multiply
    105.40x = 144.11 × 102.52
  4. Step 4: Simplify right side
    105.40x = 14,774.16
  5. Step 5: Solve for x
    x = 14,774.16/105.40
  6. Step 6: Final answer
    x = 140.17

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Why These Related Problems?

These problems maintain the same ratio (1.37) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.