Home / 78,490-115,431

Finding the Third Proportional to 78,490 and 115,431

Calculator

Solution

The third proportional to 78,490 and 115,431 is: 169,758.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,490 : 115,431 = 115,431 : x
  2. Step 2: Convert to fraction form
    78,490/115,431 = 115,431/x
  3. Step 3: Cross multiply
    78,490x = 115,431 × 115,431
  4. Step 4: Simplify right side
    78,490x = 13,324,315,761
  5. Step 5: Solve for x
    x = 13,324,315,761/78,490
  6. Step 6: Final answer
    x = 169,758.13

Related Problems

Find third proportional to 39,245 and 57,715.50
Half scale
Find third proportional to 156,980 and 230,862
Double scale
Find third proportional to 78,492 and 115,434
Similar ratio
Find third proportional to 117,735 and 173,146.50
1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.47) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.