Home / 57.66-86.91

Finding the Third Proportional to 57.66 and 86.91

Calculator

Solution

The third proportional to 57.66 and 86.91 is: 131.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    57.66 : 86.91 = 86.91 : x
  2. Step 2: Convert to fraction form
    57.66/86.91 = 86.91/x
  3. Step 3: Cross multiply
    57.66x = 86.91 × 86.91
  4. Step 4: Simplify right side
    57.66x = 7,552.70
  5. Step 5: Solve for x
    x = 7,552.70/57.66
  6. Step 6: Final answer
    x = 131.00

Related Problems

Find third proportional to 28.83 and 43.45
Half scale
Find third proportional to 115.31 and 173.81
Double scale
Find third proportional to 60 and 90
Similar ratio
Find third proportional to 86.48 and 130.36
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.