Finding the Fourth Proportional to 128,515.97, 177,350.21 and 71,149.79
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Solution
The fourth proportional to 128,515.97, 177,350.21 and 71,149.79 is: 98,185.70
Step by Step Solution
- Step 1: Write the proportion equation
128,515.97 : 177,350.21 = 71,149.79 : x - Step 2: Convert to fraction form
128,515.97/177,350.21 = 71,149.79/x - Step 3: Cross multiply
128,515.97x = 177,350.21 × 71,149.79 - Step 4: Simplify right side
128,515.97x = 12,618,429,842.21 - Step 5: Solve for x
x = 12,618,429,842.21/128,515.97 - Step 6: Final answer
x = 98,185.70
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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.