Home / 128.96-193.26-71.18

Finding the Fourth Proportional to 128.96, 193.26 and 71.18

Calculator

Solution

The fourth proportional to 128.96, 193.26 and 71.18 is: 106.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    128.96 : 193.26 = 71.18 : x
  2. Step 2: Convert to fraction form
    128.96/193.26 = 71.18/x
  3. Step 3: Cross multiply
    128.96x = 193.26 × 71.18
  4. Step 4: Simplify right side
    128.96x = 13,755.28
  5. Step 5: Solve for x
    x = 13,755.28/128.96
  6. Step 6: Final answer
    x = 106.67

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.