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Finding the Fourth Proportional to 136.58, 188.36 and 107.08

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Solution

The fourth proportional to 136.58, 188.36 and 107.08 is: 147.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    136.58 : 188.36 = 107.08 : x
  2. Step 2: Convert to fraction form
    136.58/188.36 = 107.08/x
  3. Step 3: Cross multiply
    136.58x = 188.36 × 107.08
  4. Step 4: Simplify right side
    136.58x = 20,169.59
  5. Step 5: Solve for x
    x = 20,169.59/136.58
  6. Step 6: Final answer
    x = 147.68

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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.