Home / 90.92-136.38-53.16

Finding the Fourth Proportional to 90.92, 136.38 and 53.16

Calculator

Solution

The fourth proportional to 90.92, 136.38 and 53.16 is: 79.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    90.92 : 136.38 = 53.16 : x
  2. Step 2: Convert to fraction form
    90.92/136.38 = 53.16/x
  3. Step 3: Cross multiply
    90.92x = 136.38 × 53.16
  4. Step 4: Simplify right side
    90.92x = 7,249.96
  5. Step 5: Solve for x
    x = 7,249.96/90.92
  6. Step 6: Final answer
    x = 79.74

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.