Finding the Fourth Proportional to 81,425.13, 122,137.97 and 28,836.15
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Solution
The fourth proportional to 81,425.13, 122,137.97 and 28,836.15 is: 43,254.32
Step by Step Solution
- Step 1: Write the proportion equation
81,425.13 : 122,137.97 = 28,836.15 : x - Step 2: Convert to fraction form
81,425.13/122,137.97 = 28,836.15/x - Step 3: Cross multiply
81,425.13x = 122,137.97 × 28,836.15 - Step 4: Simplify right side
81,425.13x = 3,521,988,823.62 - Step 5: Solve for x
x = 3,521,988,823.62/81,425.13 - Step 6: Final answer
x = 43,254.32
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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.