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Finding the Fourth Proportional to 120.87, 181.06 and 63.75

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Solution

The fourth proportional to 120.87, 181.06 and 63.75 is: 95.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    120.87 : 181.06 = 63.75 : x
  2. Step 2: Convert to fraction form
    120.87/181.06 = 63.75/x
  3. Step 3: Cross multiply
    120.87x = 181.06 × 63.75
  4. Step 4: Simplify right side
    120.87x = 11,542.58
  5. Step 5: Solve for x
    x = 11,542.58/120.87
  6. Step 6: Final answer
    x = 95.50

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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.