Finding the Fourth Proportional to 128,136.60, 192,350.70 and 75,575.70
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Solution
The fourth proportional to 128,136.60, 192,350.70 and 75,575.70 is: 113,449.54
Step by Step Solution
- Step 1: Write the proportion equation
128,136.60 : 192,350.70 = 75,575.70 : x - Step 2: Convert to fraction form
128,136.60/192,350.70 = 75,575.70/x - Step 3: Cross multiply
128,136.60x = 192,350.70 × 75,575.70 - Step 4: Simplify right side
128,136.60x = 14,537,038,797.99 - Step 5: Solve for x
x = 14,537,038,797.99/128,136.60 - Step 6: Final answer
x = 113,449.54
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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.