Home / 30,981-66,930

Finding the Third Proportional to 30,981 and 66,930

Calculator

Solution

The third proportional to 30,981 and 66,930 is: 144,592.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,981 : 66,930 = 66,930 : x
  2. Step 2: Convert to fraction form
    30,981/66,930 = 66,930/x
  3. Step 3: Cross multiply
    30,981x = 66,930 × 66,930
  4. Step 4: Simplify right side
    30,981x = 4,479,624,900
  5. Step 5: Solve for x
    x = 4,479,624,900/30,981
  6. Step 6: Final answer
    x = 144,592.65

Related Problems

Find third proportional to 15,490.50 and 33,465
Half scale
Find third proportional to 61,962 and 133,860
Double scale
Find third proportional to 30,983 and 66,934
Similar ratio
Find third proportional to 46,471.50 and 100,395
1.5x scale

Why These Related Problems?

These problems maintain the same ratio (2.16) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.