Finding the Fourth Proportional to 128,450.19, 192,693.74 and 39,710.62
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Solution
The fourth proportional to 128,450.19, 192,693.74 and 39,710.62 is: 59,571.64
Step by Step Solution
- Step 1: Write the proportion equation
128,450.19 : 192,693.74 = 39,710.62 : x - Step 2: Convert to fraction form
128,450.19/192,693.74 = 39,710.62/x - Step 3: Cross multiply
128,450.19x = 192,693.74 × 39,710.62 - Step 4: Simplify right side
128,450.19x = 7,651,987,885.52 - Step 5: Solve for x
x = 7,651,987,885.52/128,450.19 - Step 6: Final answer
x = 59,571.64
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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.