Home / 128,538-182,691

Finding the Third Proportional to 128,538 and 182,691

Calculator

Solution

The third proportional to 128,538 and 182,691 is: 259,658.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,538 : 182,691 = 182,691 : x
  2. Step 2: Convert to fraction form
    128,538/182,691 = 182,691/x
  3. Step 3: Cross multiply
    128,538x = 182,691 × 182,691
  4. Step 4: Simplify right side
    128,538x = 33,376,001,481
  5. Step 5: Solve for x
    x = 33,376,001,481/128,538
  6. Step 6: Final answer
    x = 259,658.63

Related Problems

Find third proportional to 64,269 and 91,345.50
Half scale
Find third proportional to 257,076 and 365,382
Double scale
Find third proportional to 128,540 and 182,694
Similar ratio
Find third proportional to 192,807 and 274,036.50
1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.42) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.