Finding the Fourth Proportional to 105,981.61, 159,107.31 and 68,697.70
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Solution
The fourth proportional to 105,981.61, 159,107.31 and 68,697.70 is: 103,133.99
Step by Step Solution
- Step 1: Write the proportion equation
105,981.61 : 159,107.31 = 68,697.70 : x - Step 2: Convert to fraction form
105,981.61/159,107.31 = 68,697.70/x - Step 3: Cross multiply
105,981.61x = 159,107.31 × 68,697.70 - Step 4: Simplify right side
105,981.61x = 10,930,306,250.19 - Step 5: Solve for x
x = 10,930,306,250.19/105,981.61 - Step 6: Final answer
x = 103,133.99
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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.