Home / 87,621-128,316

Finding the Third Proportional to 87,621 and 128,316

Calculator

Solution

The third proportional to 87,621 and 128,316 is: 187,911.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    87,621 : 128,316 = 128,316 : x
  2. Step 2: Convert to fraction form
    87,621/128,316 = 128,316/x
  3. Step 3: Cross multiply
    87,621x = 128,316 × 128,316
  4. Step 4: Simplify right side
    87,621x = 16,464,995,856
  5. Step 5: Solve for x
    x = 16,464,995,856/87,621
  6. Step 6: Final answer
    x = 187,911.53

Related Problems

Find third proportional to 43,810.50 and 64,158
Half scale
Find third proportional to 175,242 and 256,632
Double scale
Find third proportional to 87,623 and 128,319
Similar ratio
Find third proportional to 131,431.50 and 192,474
1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.46) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.