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Finding the Fourth Proportional to 181.60, 250.61 and 111.67

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Solution

The fourth proportional to 181.60, 250.61 and 111.67 is: 154.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    181.60 : 250.61 = 111.67 : x
  2. Step 2: Convert to fraction form
    181.60/250.61 = 111.67/x
  3. Step 3: Cross multiply
    181.60x = 250.61 × 111.67
  4. Step 4: Simplify right side
    181.60x = 27,984.43
  5. Step 5: Solve for x
    x = 27,984.43/181.60
  6. Step 6: Final answer
    x = 154.10

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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.