Finding the Fourth Proportional to 128,480.19, 192,744.90 and 39,718.06
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Solution
The fourth proportional to 128,480.19, 192,744.90 and 39,718.06 is: 59,584.70
Step by Step Solution
- Step 1: Write the proportion equation
128,480.19 : 192,744.90 = 39,718.06 : x - Step 2: Convert to fraction form
128,480.19/192,744.90 = 39,718.06/x - Step 3: Cross multiply
128,480.19x = 192,744.90 × 39,718.06 - Step 4: Simplify right side
128,480.19x = 7,655,454,105.22 - Step 5: Solve for x
x = 7,655,454,105.22/128,480.19 - Step 6: Final answer
x = 59,584.70
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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.