Finding the Fourth Proportional to 71,738.20, 107,558.70 and 38,009.80
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Solution
The fourth proportional to 71,738.20, 107,558.70 and 38,009.80 is: 56,988.95
Step by Step Solution
- Step 1: Write the proportion equation
71,738.20 : 107,558.70 = 38,009.80 : x - Step 2: Convert to fraction form
71,738.20/107,558.70 = 38,009.80/x - Step 3: Cross multiply
71,738.20x = 107,558.70 × 38,009.80 - Step 4: Simplify right side
71,738.20x = 4,088,284,675.26 - Step 5: Solve for x
x = 4,088,284,675.26/71,738.20 - Step 6: Final answer
x = 56,988.95
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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.