Finding the Fourth Proportional to 128,258.80, 192,423.44 and 53,413.99
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Solution
The fourth proportional to 128,258.80, 192,423.44 and 53,413.99 is: 80,135.66
Step by Step Solution
- Step 1: Write the proportion equation
128,258.80 : 192,423.44 = 53,413.99 : x - Step 2: Convert to fraction form
128,258.80/192,423.44 = 53,413.99/x - Step 3: Cross multiply
128,258.80x = 192,423.44 × 53,413.99 - Step 4: Simplify right side
128,258.80x = 10,278,103,352.40 - Step 5: Solve for x
x = 10,278,103,352.40/128,258.80 - Step 6: Final answer
x = 80,135.66
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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.