Finding the Fourth Proportional to 128,611.60, 192,823.94 and 53,753.12
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Solution
The fourth proportional to 128,611.60, 192,823.94 and 53,753.12 is: 80,590.62
Step by Step Solution
- Step 1: Write the proportion equation
128,611.60 : 192,823.94 = 53,753.12 : x - Step 2: Convert to fraction form
128,611.60/192,823.94 = 53,753.12/x - Step 3: Cross multiply
128,611.60x = 192,823.94 × 53,753.12 - Step 4: Simplify right side
128,611.60x = 10,364,888,279.05 - Step 5: Solve for x
x = 10,364,888,279.05/128,611.60 - Step 6: Final answer
x = 80,590.62
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1.5x scale
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.