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Finding the Fourth Proportional to 120.08, 181.15 and 114.40

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Solution

The fourth proportional to 120.08, 181.15 and 114.40 is: 172.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    120.08 : 181.15 = 114.40 : x
  2. Step 2: Convert to fraction form
    120.08/181.15 = 114.40/x
  3. Step 3: Cross multiply
    120.08x = 181.15 × 114.40
  4. Step 4: Simplify right side
    120.08x = 20,723.56
  5. Step 5: Solve for x
    x = 20,723.56/120.08
  6. Step 6: Final answer
    x = 172.58

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Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.