Finding the Fourth Proportional to 129,861.63, 179,211.84 and 71,718.18
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Solution
The fourth proportional to 129,861.63, 179,211.84 and 71,718.18 is: 98,972.63
Step by Step Solution
- Step 1: Write the proportion equation
129,861.63 : 179,211.84 = 71,718.18 : x - Step 2: Convert to fraction form
129,861.63/179,211.84 = 71,718.18/x - Step 3: Cross multiply
129,861.63x = 179,211.84 × 71,718.18 - Step 4: Simplify right side
129,861.63x = 12,852,746,999.25 - Step 5: Solve for x
x = 12,852,746,999.25/129,861.63 - Step 6: Final answer
x = 98,972.63
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1.5x scale
Why These Related Problems?
These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.