Home / 122.58-168.96-81.06

Finding the Fourth Proportional to 122.58, 168.96 and 81.06

Calculator

Solution

The fourth proportional to 122.58, 168.96 and 81.06 is: 111.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    122.58 : 168.96 = 81.06 : x
  2. Step 2: Convert to fraction form
    122.58/168.96 = 81.06/x
  3. Step 3: Cross multiply
    122.58x = 168.96 × 81.06
  4. Step 4: Simplify right side
    122.58x = 13,695.90
  5. Step 5: Solve for x
    x = 13,695.90/122.58
  6. Step 6: Final answer
    x = 111.73

Related Problems

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.