Home / 106.50-120

Finding the Third Proportional to 106.50 and 120

Calculator

Solution

The third proportional to 106.50 and 120 is: 135.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    106.50 : 120 = 120 : x
  2. Step 2: Convert to fraction form
    106.50/120 = 120/x
  3. Step 3: Cross multiply
    106.50x = 120 × 120
  4. Step 4: Simplify right side
    106.50x = 14,400
  5. Step 5: Solve for x
    x = 14,400/106.50
  6. Step 6: Final answer
    x = 135.21

Related Problems

Find third proportional to 53.25 and 60
Half scale
Find third proportional to 213 and 240
Double scale
Find third proportional to 109 and 122
Similar ratio
Find third proportional to 159.75 and 180
1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.13) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.