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Finding the Fourth Proportional to 181.99, 272.79 and 90.51

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Solution

The fourth proportional to 181.99, 272.79 and 90.51 is: 135.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    181.99 : 272.79 = 90.51 : x
  2. Step 2: Convert to fraction form
    181.99/272.79 = 90.51/x
  3. Step 3: Cross multiply
    181.99x = 272.79 × 90.51
  4. Step 4: Simplify right side
    181.99x = 24,690.22
  5. Step 5: Solve for x
    x = 24,690.22/181.99
  6. Step 6: Final answer
    x = 135.67

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.