Home / 107.40-161.22-53.28

Finding the Fourth Proportional to 107.40, 161.22 and 53.28

Calculator

Solution

The fourth proportional to 107.40, 161.22 and 53.28 is: 79.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    107.40 : 161.22 = 53.28 : x
  2. Step 2: Convert to fraction form
    107.40/161.22 = 53.28/x
  3. Step 3: Cross multiply
    107.40x = 161.22 × 53.28
  4. Step 4: Simplify right side
    107.40x = 8,589.80
  5. Step 5: Solve for x
    x = 8,589.80/107.40
  6. Step 6: Final answer
    x = 79.98

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.