Home / 137.38-189.55-85.66

Finding the Fourth Proportional to 137.38, 189.55 and 85.66

Calculator

Solution

The fourth proportional to 137.38, 189.55 and 85.66 is: 118.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    137.38 : 189.55 = 85.66 : x
  2. Step 2: Convert to fraction form
    137.38/189.55 = 85.66/x
  3. Step 3: Cross multiply
    137.38x = 189.55 × 85.66
  4. Step 4: Simplify right side
    137.38x = 16,236.85
  5. Step 5: Solve for x
    x = 16,236.85/137.38
  6. Step 6: Final answer
    x = 118.19

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.