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Finding the Fourth Proportional to 119.43, 164.57 and 105.53

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Solution

The fourth proportional to 119.43, 164.57 and 105.53 is: 145.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    119.43 : 164.57 = 105.53 : x
  2. Step 2: Convert to fraction form
    119.43/164.57 = 105.53/x
  3. Step 3: Cross multiply
    119.43x = 164.57 × 105.53
  4. Step 4: Simplify right side
    119.43x = 17,365.72
  5. Step 5: Solve for x
    x = 17,365.72/119.43
  6. Step 6: Final answer
    x = 145.41

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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.