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Finding the Fourth Proportional to 185.19, 255.55 and 111.48

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Solution

The fourth proportional to 185.19, 255.55 and 111.48 is: 153.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    185.19 : 255.55 = 111.48 : x
  2. Step 2: Convert to fraction form
    185.19/255.55 = 111.48/x
  3. Step 3: Cross multiply
    185.19x = 255.55 × 111.48
  4. Step 4: Simplify right side
    185.19x = 28,488.71
  5. Step 5: Solve for x
    x = 28,488.71/185.19
  6. Step 6: Final answer
    x = 153.84

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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.