Home / 78,358-172,266

Finding the Third Proportional to 78,358 and 172,266

Calculator

Solution

The third proportional to 78,358 and 172,266 is: 378,717.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,358 : 172,266 = 172,266 : x
  2. Step 2: Convert to fraction form
    78,358/172,266 = 172,266/x
  3. Step 3: Cross multiply
    78,358x = 172,266 × 172,266
  4. Step 4: Simplify right side
    78,358x = 29,675,574,756
  5. Step 5: Solve for x
    x = 29,675,574,756/78,358
  6. Step 6: Final answer
    x = 378,717.87

Related Problems

Find third proportional to 39,179 and 86,133
Half scale
Find third proportional to 156,716 and 344,532
Double scale
Find third proportional to 78,360 and 172,270
Similar ratio
Find third proportional to 117,537 and 258,399
1.5x scale

Why These Related Problems?

These problems maintain the same ratio (2.20) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.