Home / 128,072-281,056

Finding the Third Proportional to 128,072 and 281,056

Calculator

Solution

The third proportional to 128,072 and 281,056 is: 616,781.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,072 : 281,056 = 281,056 : x
  2. Step 2: Convert to fraction form
    128,072/281,056 = 281,056/x
  3. Step 3: Cross multiply
    128,072x = 281,056 × 281,056
  4. Step 4: Simplify right side
    128,072x = 78,992,475,136
  5. Step 5: Solve for x
    x = 78,992,475,136/128,072
  6. Step 6: Final answer
    x = 616,781.77

Related Problems

Find third proportional to 64,036 and 140,528
Half scale
Find third proportional to 256,144 and 562,112
Double scale
Find third proportional to 128,074 and 281,060
Similar ratio
Find third proportional to 192,108 and 421,584
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.