Finding the Fourth Proportional to 128,310.32, 192,453.09 and 39,539.99
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Solution
The fourth proportional to 128,310.32, 192,453.09 and 39,539.99 is: 59,306.17
Step by Step Solution
- Step 1: Write the proportion equation
128,310.32 : 192,453.09 = 39,539.99 : x - Step 2: Convert to fraction form
128,310.32/192,453.09 = 39,539.99/x - Step 3: Cross multiply
128,310.32x = 192,453.09 × 39,539.99 - Step 4: Simplify right side
128,310.32x = 7,609,593,254.07 - Step 5: Solve for x
x = 7,609,593,254.07/128,310.32 - Step 6: Final answer
x = 59,306.17
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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.