Home / 79-149

Finding the Third Proportional to 79 and 149

Calculator

Solution

The third proportional to 79 and 149 is: 281.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    79 : 149 = 149 : x
  2. Step 2: Convert to fraction form
    79/149 = 149/x
  3. Step 3: Cross multiply
    79x = 149 × 149
  4. Step 4: Simplify right side
    79x = 22,201
  5. Step 5: Solve for x
    x = 22,201/79
  6. Step 6: Final answer
    x = 281.03

Related Problems

Find third proportional to 39.50 and 74.50
Half scale
Find third proportional to 158 and 298
Double scale
Find third proportional to 81 and 153
Similar ratio
Find third proportional to 118.50 and 223.50
1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.89) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.