Home / 101-180

Finding the Third Proportional to 101 and 180

Calculator

Solution

The third proportional to 101 and 180 is: 320.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    101 : 180 = 180 : x
  2. Step 2: Convert to fraction form
    101/180 = 180/x
  3. Step 3: Cross multiply
    101x = 180 × 180
  4. Step 4: Simplify right side
    101x = 32,400
  5. Step 5: Solve for x
    x = 32,400/101
  6. Step 6: Final answer
    x = 320.79

Related Problems

Find third proportional to 50.50 and 90
Half scale
Find third proportional to 202 and 360
Double scale
Find third proportional to 103 and 184
Similar ratio
Find third proportional to 151.50 and 270
1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.78) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.