Home / 64.81-90.75

Finding the Third Proportional to 64.81 and 90.75

Calculator

Solution

The third proportional to 64.81 and 90.75 is: 127.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    64.81 : 90.75 = 90.75 : x
  2. Step 2: Convert to fraction form
    64.81/90.75 = 90.75/x
  3. Step 3: Cross multiply
    64.81x = 90.75 × 90.75
  4. Step 4: Simplify right side
    64.81x = 8,235.56
  5. Step 5: Solve for x
    x = 8,235.56/64.81
  6. Step 6: Final answer
    x = 127.07

Related Problems

Find third proportional to 32.41 and 45.38
Half scale
Find third proportional to 129.63 and 181.50
Double scale
Find third proportional to 67 and 94
Similar ratio
Find third proportional to 97.22 and 136.13
1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.40) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.