Finding the Fourth Proportional to 128,664.77, 192,987.90 and 39,915.99
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Solution
The fourth proportional to 128,664.77, 192,987.90 and 39,915.99 is: 59,871.12
Step by Step Solution
- Step 1: Write the proportion equation
128,664.77 : 192,987.90 = 39,915.99 : x - Step 2: Convert to fraction form
128,664.77/192,987.90 = 39,915.99/x - Step 3: Cross multiply
128,664.77x = 192,987.90 × 39,915.99 - Step 4: Simplify right side
128,664.77x = 7,703,303,086.52 - Step 5: Solve for x
x = 7,703,303,086.52/128,664.77 - Step 6: Final answer
x = 59,871.12
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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.