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Finding the Fourth Proportional to 107.36, 148.08 and 68

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Solution

The fourth proportional to 107.36, 148.08 and 68 is: 93.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    107.36 : 148.08 = 68 : x
  2. Step 2: Convert to fraction form
    107.36/148.08 = 68/x
  3. Step 3: Cross multiply
    107.36x = 148.08 × 68
  4. Step 4: Simplify right side
    107.36x = 10,069.44
  5. Step 5: Solve for x
    x = 10,069.44/107.36
  6. Step 6: Final answer
    x = 93.79

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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.