Finding the Fourth Proportional to 102,753.20, 154,129.80 and 79,425.20
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Solution
The fourth proportional to 102,753.20, 154,129.80 and 79,425.20 is: 119,137.80
Step by Step Solution
- Step 1: Write the proportion equation
102,753.20 : 154,129.80 = 79,425.20 : x - Step 2: Convert to fraction form
102,753.20/154,129.80 = 79,425.20/x - Step 3: Cross multiply
102,753.20x = 154,129.80 × 79,425.20 - Step 4: Simplify right side
102,753.20x = 12,241,790,190.96 - Step 5: Solve for x
x = 12,241,790,190.96/102,753.20 - Step 6: Final answer
x = 119,137.80
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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.