Finding the Fourth Proportional to 100,386.79, 138,535.62 and 55,067.09
Calculator
Solution
The fourth proportional to 100,386.79, 138,535.62 and 55,067.09 is: 75,993.60
Step by Step Solution
- Step 1: Write the proportion equation
100,386.79 : 138,535.62 = 55,067.09 : x - Step 2: Convert to fraction form
100,386.79/138,535.62 = 55,067.09/x - Step 3: Cross multiply
100,386.79x = 138,535.62 × 55,067.09 - Step 4: Simplify right side
100,386.79x = 7,628,753,334.83 - Step 5: Solve for x
x = 7,628,753,334.83/100,386.79 - Step 6: Final answer
x = 75,993.60
Related Problems
Find fourth proportional to 50,193.40, 69,267.81 and 27,533.55
Half scale
Find fourth proportional to 200,773.59, 277,071.23 and 110,134.18
Double scale
Find fourth proportional to 100,387.79, 138,537 and 55,068.09
Similar ratio
Find fourth proportional to 150,580.19, 207,803.42 and 82,600.64
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.