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Finding the Fourth Proportional to 142.07, 195.81 and 105.17

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Solution

The fourth proportional to 142.07, 195.81 and 105.17 is: 144.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    142.07 : 195.81 = 105.17 : x
  2. Step 2: Convert to fraction form
    142.07/195.81 = 105.17/x
  3. Step 3: Cross multiply
    142.07x = 195.81 × 105.17
  4. Step 4: Simplify right side
    142.07x = 20,593.34
  5. Step 5: Solve for x
    x = 20,593.34/142.07
  6. Step 6: Final answer
    x = 144.95

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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.