Home / 66,990-90,975

Finding the Third Proportional to 66,990 and 90,975

Calculator

Solution

The third proportional to 66,990 and 90,975 is: 123,547.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,990 : 90,975 = 90,975 : x
  2. Step 2: Convert to fraction form
    66,990/90,975 = 90,975/x
  3. Step 3: Cross multiply
    66,990x = 90,975 × 90,975
  4. Step 4: Simplify right side
    66,990x = 8,276,450,625
  5. Step 5: Solve for x
    x = 8,276,450,625/66,990
  6. Step 6: Final answer
    x = 123,547.55

Related Problems

Find third proportional to 33,495 and 45,487.50
Half scale
Find third proportional to 133,980 and 181,950
Double scale
Find third proportional to 66,992 and 90,978
Similar ratio
Find third proportional to 100,485 and 136,462.50
1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.36) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.