Finding the Fourth Proportional to 128,720.80, 193,081.20 and 124,055.20
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Solution
The fourth proportional to 128,720.80, 193,081.20 and 124,055.20 is: 186,082.80
Step by Step Solution
- Step 1: Write the proportion equation
128,720.80 : 193,081.20 = 124,055.20 : x - Step 2: Convert to fraction form
128,720.80/193,081.20 = 124,055.20/x - Step 3: Cross multiply
128,720.80x = 193,081.20 × 124,055.20 - Step 4: Simplify right side
128,720.80x = 23,952,726,882.24 - Step 5: Solve for x
x = 23,952,726,882.24/128,720.80 - Step 6: Final answer
x = 186,082.80
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Why These Related Problems?
These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.