Finding the Fourth Proportional to 134,988.12, 186,303.24 and 78,430.68
Calculator
Solution
The fourth proportional to 134,988.12, 186,303.24 and 78,430.68 is: 108,245.75
Step by Step Solution
- Step 1: Write the proportion equation
134,988.12 : 186,303.24 = 78,430.68 : x - Step 2: Convert to fraction form
134,988.12/186,303.24 = 78,430.68/x - Step 3: Cross multiply
134,988.12x = 186,303.24 × 78,430.68 - Step 4: Simplify right side
134,988.12x = 14,611,889,799.40 - Step 5: Solve for x
x = 14,611,889,799.40/134,988.12 - Step 6: Final answer
x = 108,245.75
Related Problems
Find fourth proportional to 67,494.06, 93,151.62 and 39,215.34
Half scale
Find fourth proportional to 269,976.24, 372,606.48 and 156,861.36
Double scale
Find fourth proportional to 134,989.12, 186,304.62 and 78,431.68
Similar ratio
Find fourth proportional to 202,482.18, 279,454.86 and 117,646.02
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.