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Finding the Fourth Proportional to 185.36, 255.86 and 107.80

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Solution

The fourth proportional to 185.36, 255.86 and 107.80 is: 148.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    185.36 : 255.86 = 107.80 : x
  2. Step 2: Convert to fraction form
    185.36/255.86 = 107.80/x
  3. Step 3: Cross multiply
    185.36x = 255.86 × 107.80
  4. Step 4: Simplify right side
    185.36x = 27,581.71
  5. Step 5: Solve for x
    x = 27,581.71/185.36
  6. Step 6: Final answer
    x = 148.80

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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.