Home / 120.80-180.96-108.66

Finding the Fourth Proportional to 120.80, 180.96 and 108.66

Calculator

Solution

The fourth proportional to 120.80, 180.96 and 108.66 is: 162.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    120.80 : 180.96 = 108.66 : x
  2. Step 2: Convert to fraction form
    120.80/180.96 = 108.66/x
  3. Step 3: Cross multiply
    120.80x = 180.96 × 108.66
  4. Step 4: Simplify right side
    120.80x = 19,663.11
  5. Step 5: Solve for x
    x = 19,663.11/120.80
  6. Step 6: Final answer
    x = 162.77

Related Problems

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.