Home / 122.81-135.56

Finding the Third Proportional to 122.81 and 135.56

Calculator

Solution

The third proportional to 122.81 and 135.56 is: 149.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    122.81 : 135.56 = 135.56 : x
  2. Step 2: Convert to fraction form
    122.81/135.56 = 135.56/x
  3. Step 3: Cross multiply
    122.81x = 135.56 × 135.56
  4. Step 4: Simplify right side
    122.81x = 18,377.19
  5. Step 5: Solve for x
    x = 18,377.19/122.81
  6. Step 6: Final answer
    x = 149.64

Related Problems

Find third proportional to 61.41 and 67.78
Half scale
Find third proportional to 245.63 and 271.13
Double scale
Find third proportional to 125 and 138
Similar ratio
Find third proportional to 184.22 and 203.34
1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.10) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.