Home / 78,778.50-172,869

Finding the Third Proportional to 78,778.50 and 172,869

Calculator

Solution

The third proportional to 78,778.50 and 172,869 is: 379,338.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,778.50 : 172,869 = 172,869 : x
  2. Step 2: Convert to fraction form
    78,778.50/172,869 = 172,869/x
  3. Step 3: Cross multiply
    78,778.50x = 172,869 × 172,869
  4. Step 4: Simplify right side
    78,778.50x = 29,883,691,161
  5. Step 5: Solve for x
    x = 29,883,691,161/78,778.50
  6. Step 6: Final answer
    x = 379,338.16

Related Problems

Find third proportional to 39,389.25 and 86,434.50
Half scale
Find third proportional to 157,557 and 345,738
Double scale
Find third proportional to 78,781 and 172,873
Similar ratio
Find third proportional to 118,167.75 and 259,303.50
1.5x scale

Why These Related Problems?

These problems maintain the same ratio (2.19) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.