Finding the Fourth Proportional to 99,920.12, 149,836.26 and 53,161.88
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Solution
The fourth proportional to 99,920.12, 149,836.26 and 53,161.88 is: 79,719.45
Step by Step Solution
- Step 1: Write the proportion equation
99,920.12 : 149,836.26 = 53,161.88 : x - Step 2: Convert to fraction form
99,920.12/149,836.26 = 53,161.88/x - Step 3: Cross multiply
99,920.12x = 149,836.26 × 53,161.88 - Step 4: Simplify right side
99,920.12x = 7,965,577,273.77 - Step 5: Solve for x
x = 7,965,577,273.77/99,920.12 - Step 6: Final answer
x = 79,719.45
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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.