Home / 39,688-87,312

Finding the Third Proportional to 39,688 and 87,312

Calculator

Solution

The third proportional to 39,688 and 87,312 is: 192,082.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,688 : 87,312 = 87,312 : x
  2. Step 2: Convert to fraction form
    39,688/87,312 = 87,312/x
  3. Step 3: Cross multiply
    39,688x = 87,312 × 87,312
  4. Step 4: Simplify right side
    39,688x = 7,623,385,344
  5. Step 5: Solve for x
    x = 7,623,385,344/39,688
  6. Step 6: Final answer
    x = 192,082.88

Related Problems

Find third proportional to 19,844 and 43,656
Half scale
Find third proportional to 79,376 and 174,624
Double scale
Find third proportional to 39,690 and 87,316
Similar ratio
Find third proportional to 59,532 and 130,968
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.