Finding the Fourth Proportional to 100,239.68, 138,278.24 and 61,987.02
Calculator
Solution
The fourth proportional to 100,239.68, 138,278.24 and 61,987.02 is: 85,509.62
Step by Step Solution
- Step 1: Write the proportion equation
100,239.68 : 138,278.24 = 61,987.02 : x - Step 2: Convert to fraction form
100,239.68/138,278.24 = 61,987.02/x - Step 3: Cross multiply
100,239.68x = 138,278.24 × 61,987.02 - Step 4: Simplify right side
100,239.68x = 8,571,456,210.23 - Step 5: Solve for x
x = 8,571,456,210.23/100,239.68 - Step 6: Final answer
x = 85,509.62
Related Problems
Find fourth proportional to 50,119.84, 69,139.12 and 30,993.51
Half scale
Find fourth proportional to 200,479.35, 276,556.48 and 123,974.04
Double scale
Find fourth proportional to 100,240.68, 138,279.62 and 61,988.02
Similar ratio
Find fourth proportional to 150,359.52, 207,417.36 and 92,980.53
1.5x scale
Why These Related Problems?
These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.