Home / 30,729-66,129

Finding the Third Proportional to 30,729 and 66,129

Calculator

Solution

The third proportional to 30,729 and 66,129 is: 142,310.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,729 : 66,129 = 66,129 : x
  2. Step 2: Convert to fraction form
    30,729/66,129 = 66,129/x
  3. Step 3: Cross multiply
    30,729x = 66,129 × 66,129
  4. Step 4: Simplify right side
    30,729x = 4,373,044,641
  5. Step 5: Solve for x
    x = 4,373,044,641/30,729
  6. Step 6: Final answer
    x = 142,310.02

Related Problems

Find third proportional to 15,364.50 and 33,064.50
Half scale
Find third proportional to 61,458 and 132,258
Double scale
Find third proportional to 30,731 and 66,133
Similar ratio
Find third proportional to 46,093.50 and 99,193.50
1.5x scale

Why These Related Problems?

These problems maintain the same ratio (2.15) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.