Home / 71-151

Finding the Third Proportional to 71 and 151

Calculator

Solution

The third proportional to 71 and 151 is: 321.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    71 : 151 = 151 : x
  2. Step 2: Convert to fraction form
    71/151 = 151/x
  3. Step 3: Cross multiply
    71x = 151 × 151
  4. Step 4: Simplify right side
    71x = 22,801
  5. Step 5: Solve for x
    x = 22,801/71
  6. Step 6: Final answer
    x = 321.14

Related Problems

Find third proportional to 35.50 and 75.50
Half scale
Find third proportional to 142 and 302
Double scale
Find third proportional to 73 and 155
Similar ratio
Find third proportional to 106.50 and 226.50
1.5x scale

Why These Related Problems?

These problems maintain the same ratio (2.13) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.