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Finding the Fourth Proportional to 138.33, 190.85 and 110.65

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Solution

The fourth proportional to 138.33, 190.85 and 110.65 is: 152.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    138.33 : 190.85 = 110.65 : x
  2. Step 2: Convert to fraction form
    138.33/190.85 = 110.65/x
  3. Step 3: Cross multiply
    138.33x = 190.85 × 110.65
  4. Step 4: Simplify right side
    138.33x = 21,117.55
  5. Step 5: Solve for x
    x = 21,117.55/138.33
  6. Step 6: Final answer
    x = 152.66

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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.