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Finding the Fourth Proportional to 120.84, 181.02 and 116.37

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Solution

The fourth proportional to 120.84, 181.02 and 116.37 is: 174.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    120.84 : 181.02 = 116.37 : x
  2. Step 2: Convert to fraction form
    120.84/181.02 = 116.37/x
  3. Step 3: Cross multiply
    120.84x = 181.02 × 116.37
  4. Step 4: Simplify right side
    120.84x = 21,065.30
  5. Step 5: Solve for x
    x = 21,065.30/120.84
  6. Step 6: Final answer
    x = 174.32

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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.