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Finding the Fourth Proportional to 181.70, 250.72 and 111.77

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Solution

The fourth proportional to 181.70, 250.72 and 111.77 is: 154.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    181.70 : 250.72 = 111.77 : x
  2. Step 2: Convert to fraction form
    181.70/250.72 = 111.77/x
  3. Step 3: Cross multiply
    181.70x = 250.72 × 111.77
  4. Step 4: Simplify right side
    181.70x = 28,023.32
  5. Step 5: Solve for x
    x = 28,023.32/181.70
  6. Step 6: Final answer
    x = 154.23

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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.