Home / 43.50-80

Finding the Third Proportional to 43.50 and 80

Calculator

Solution

The third proportional to 43.50 and 80 is: 147.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    43.50 : 80 = 80 : x
  2. Step 2: Convert to fraction form
    43.50/80 = 80/x
  3. Step 3: Cross multiply
    43.50x = 80 × 80
  4. Step 4: Simplify right side
    43.50x = 6,400
  5. Step 5: Solve for x
    x = 6,400/43.50
  6. Step 6: Final answer
    x = 147.13

Related Problems

Find third proportional to 21.75 and 40
Half scale
Find third proportional to 87 and 160
Double scale
Find third proportional to 46 and 84
Similar ratio
Find third proportional to 65.25 and 120
1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.84) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.