Home / 80.79-111.56-76.24

Finding the Fourth Proportional to 80.79, 111.56 and 76.24

Calculator

Solution

The fourth proportional to 80.79, 111.56 and 76.24 is: 105.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    80.79 : 111.56 = 76.24 : x
  2. Step 2: Convert to fraction form
    80.79/111.56 = 76.24/x
  3. Step 3: Cross multiply
    80.79x = 111.56 × 76.24
  4. Step 4: Simplify right side
    80.79x = 8,505.33
  5. Step 5: Solve for x
    x = 8,505.33/80.79
  6. Step 6: Final answer
    x = 105.28

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.