Home / 80.73-111.31-51.57

Finding the Fourth Proportional to 80.73, 111.31 and 51.57

Calculator

Solution

The fourth proportional to 80.73, 111.31 and 51.57 is: 71.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    80.73 : 111.31 = 51.57 : x
  2. Step 2: Convert to fraction form
    80.73/111.31 = 51.57/x
  3. Step 3: Cross multiply
    80.73x = 111.31 × 51.57
  4. Step 4: Simplify right side
    80.73x = 5,740.13
  5. Step 5: Solve for x
    x = 5,740.13/80.73
  6. Step 6: Final answer
    x = 71.10

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.