Home / 127.69-191.69-86.04

Finding the Fourth Proportional to 127.69, 191.69 and 86.04

Calculator

Solution

The fourth proportional to 127.69, 191.69 and 86.04 is: 129.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    127.69 : 191.69 = 86.04 : x
  2. Step 2: Convert to fraction form
    127.69/191.69 = 86.04/x
  3. Step 3: Cross multiply
    127.69x = 191.69 × 86.04
  4. Step 4: Simplify right side
    127.69x = 16,493.01
  5. Step 5: Solve for x
    x = 16,493.01/127.69
  6. Step 6: Final answer
    x = 129.16

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.