Home / 121,518-178,173

Finding the Third Proportional to 121,518 and 178,173

Calculator

Solution

The third proportional to 121,518 and 178,173 is: 261,242.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    121,518 : 178,173 = 178,173 : x
  2. Step 2: Convert to fraction form
    121,518/178,173 = 178,173/x
  3. Step 3: Cross multiply
    121,518x = 178,173 × 178,173
  4. Step 4: Simplify right side
    121,518x = 31,745,617,929
  5. Step 5: Solve for x
    x = 31,745,617,929/121,518
  6. Step 6: Final answer
    x = 261,242.10

Related Problems

Find third proportional to 60,759 and 89,086.50
Half scale
Find third proportional to 243,036 and 356,346
Double scale
Find third proportional to 121,520 and 178,176
Similar ratio
Find third proportional to 182,277 and 267,259.50
1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.47) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.