Home / 84.75-128.25

Finding the Third Proportional to 84.75 and 128.25

Calculator

Solution

The third proportional to 84.75 and 128.25 is: 194.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    84.75 : 128.25 = 128.25 : x
  2. Step 2: Convert to fraction form
    84.75/128.25 = 128.25/x
  3. Step 3: Cross multiply
    84.75x = 128.25 × 128.25
  4. Step 4: Simplify right side
    84.75x = 16,448.06
  5. Step 5: Solve for x
    x = 16,448.06/84.75
  6. Step 6: Final answer
    x = 194.08

Related Problems

Find third proportional to 42.38 and 64.13
Half scale
Find third proportional to 169.50 and 256.50
Double scale
Find third proportional to 87 and 131
Similar ratio
Find third proportional to 127.13 and 192.38
1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.