Home / 65,421-143,289

Finding the Third Proportional to 65,421 and 143,289

Calculator

Solution

The third proportional to 65,421 and 143,289 is: 313,840.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    65,421 : 143,289 = 143,289 : x
  2. Step 2: Convert to fraction form
    65,421/143,289 = 143,289/x
  3. Step 3: Cross multiply
    65,421x = 143,289 × 143,289
  4. Step 4: Simplify right side
    65,421x = 20,531,737,521
  5. Step 5: Solve for x
    x = 20,531,737,521/65,421
  6. Step 6: Final answer
    x = 313,840.17

Related Problems

Find third proportional to 32,710.50 and 71,644.50
Half scale
Find third proportional to 130,842 and 286,578
Double scale
Find third proportional to 65,423 and 143,293
Similar ratio
Find third proportional to 98,131.50 and 214,933.50
1.5x scale

Why These Related Problems?

These problems maintain the same ratio (2.19) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.