Finding the Fourth Proportional to 98,840.12, 136,409.09 and 56,405.03
Calculator
Solution
The fourth proportional to 98,840.12, 136,409.09 and 56,405.03 is: 77,844.49
Step by Step Solution
- Step 1: Write the proportion equation
98,840.12 : 136,409.09 = 56,405.03 : x - Step 2: Convert to fraction form
98,840.12/136,409.09 = 56,405.03/x - Step 3: Cross multiply
98,840.12x = 136,409.09 × 56,405.03 - Step 4: Simplify right side
98,840.12x = 7,694,157,849.65 - Step 5: Solve for x
x = 7,694,157,849.65/98,840.12 - Step 6: Final answer
x = 77,844.49
Related Problems
Find fourth proportional to 49,420.06, 68,204.54 and 28,202.51
Half scale
Find fourth proportional to 197,680.23, 272,818.17 and 112,810.05
Double scale
Find fourth proportional to 98,841.12, 136,410.47 and 56,406.03
Similar ratio
Find fourth proportional to 148,260.17, 204,613.63 and 84,607.54
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.