Home / 90.75-170.25

Finding the Third Proportional to 90.75 and 170.25

Calculator

Solution

The third proportional to 90.75 and 170.25 is: 319.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    90.75 : 170.25 = 170.25 : x
  2. Step 2: Convert to fraction form
    90.75/170.25 = 170.25/x
  3. Step 3: Cross multiply
    90.75x = 170.25 × 170.25
  4. Step 4: Simplify right side
    90.75x = 28,985.06
  5. Step 5: Solve for x
    x = 28,985.06/90.75
  6. Step 6: Final answer
    x = 319.39

Related Problems

Find third proportional to 45.38 and 85.13
Half scale
Find third proportional to 181.50 and 340.50
Double scale
Find third proportional to 93 and 174
Similar ratio
Find third proportional to 136.13 and 255.38
1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.88) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.