Home / 76.92-106.01-57.21

Finding the Fourth Proportional to 76.92, 106.01 and 57.21

Calculator

Solution

The fourth proportional to 76.92, 106.01 and 57.21 is: 78.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    76.92 : 106.01 = 57.21 : x
  2. Step 2: Convert to fraction form
    76.92/106.01 = 57.21/x
  3. Step 3: Cross multiply
    76.92x = 106.01 × 57.21
  4. Step 4: Simplify right side
    76.92x = 6,064.83
  5. Step 5: Solve for x
    x = 6,064.83/76.92
  6. Step 6: Final answer
    x = 78.85

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.