Finding the Fourth Proportional to 103,990.58, 143,506.99 and 56,243.92
Calculator
Solution
The fourth proportional to 103,990.58, 143,506.99 and 56,243.92 is: 77,616.59
Step by Step Solution
- Step 1: Write the proportion equation
103,990.58 : 143,506.99 = 56,243.92 : x - Step 2: Convert to fraction form
103,990.58/143,506.99 = 56,243.92/x - Step 3: Cross multiply
103,990.58x = 143,506.99 × 56,243.92 - Step 4: Simplify right side
103,990.58x = 8,071,394,666.25 - Step 5: Solve for x
x = 8,071,394,666.25/103,990.58 - Step 6: Final answer
x = 77,616.59
Related Problems
Find fourth proportional to 51,995.29, 71,753.49 and 28,121.96
Half scale
Find fourth proportional to 207,981.16, 287,013.97 and 112,487.83
Double scale
Find fourth proportional to 103,991.58, 143,508.36 and 56,244.92
Similar ratio
Find fourth proportional to 155,985.87, 215,260.48 and 84,365.87
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.