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Finding the Fourth Proportional to 107.36, 147.16 and 105.68

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Solution

The fourth proportional to 107.36, 147.16 and 105.68 is: 144.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    107.36 : 147.16 = 105.68 : x
  2. Step 2: Convert to fraction form
    107.36/147.16 = 105.68/x
  3. Step 3: Cross multiply
    107.36x = 147.16 × 105.68
  4. Step 4: Simplify right side
    107.36x = 15,551.87
  5. Step 5: Solve for x
    x = 15,551.87/107.36
  6. Step 6: Final answer
    x = 144.86

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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.