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Finding the Fourth Proportional to 120.95, 181.41 and 60.05

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Solution

The fourth proportional to 120.95, 181.41 and 60.05 is: 90.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    120.95 : 181.41 = 60.05 : x
  2. Step 2: Convert to fraction form
    120.95/181.41 = 60.05/x
  3. Step 3: Cross multiply
    120.95x = 181.41 × 60.05
  4. Step 4: Simplify right side
    120.95x = 10,893.67
  5. Step 5: Solve for x
    x = 10,893.67/120.95
  6. Step 6: Final answer
    x = 90.07

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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.