Home / 78,488-115,428

Finding the Third Proportional to 78,488 and 115,428

Calculator

Solution

The third proportional to 78,488 and 115,428 is: 169,753.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,488 : 115,428 = 115,428 : x
  2. Step 2: Convert to fraction form
    78,488/115,428 = 115,428/x
  3. Step 3: Cross multiply
    78,488x = 115,428 × 115,428
  4. Step 4: Simplify right side
    78,488x = 13,323,623,184
  5. Step 5: Solve for x
    x = 13,323,623,184/78,488
  6. Step 6: Final answer
    x = 169,753.63

Related Problems

Find third proportional to 39,244 and 57,714
Half scale
Find third proportional to 156,976 and 230,856
Double scale
Find third proportional to 78,490 and 115,431
Similar ratio
Find third proportional to 117,732 and 173,142
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.