Home / 128,817-261,272.25

Finding the Third Proportional to 128,817 and 261,272.25

Calculator

Solution

The third proportional to 128,817 and 261,272.25 is: 529,923.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,817 : 261,272.25 = 261,272.25 : x
  2. Step 2: Convert to fraction form
    128,817/261,272.25 = 261,272.25/x
  3. Step 3: Cross multiply
    128,817x = 261,272.25 × 261,272.25
  4. Step 4: Simplify right side
    128,817x = 68,263,188,620.06
  5. Step 5: Solve for x
    x = 68,263,188,620.06/128,817
  6. Step 6: Final answer
    x = 529,923.76

Related Problems

Find third proportional to 64,408.50 and 130,636.13
Half scale
Find third proportional to 257,634 and 522,544.50
Double scale
Find third proportional to 128,819 and 261,276
Similar ratio
Find third proportional to 193,225.50 and 391,908.38
1.5x scale

Why These Related Problems?

These problems maintain the same ratio (2.03) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.