Finding the Fourth Proportional to 74,413.13, 102,684.80 and 42,138.48
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Solution
The fourth proportional to 74,413.13, 102,684.80 and 42,138.48 is: 58,148.09
Step by Step Solution
- Step 1: Write the proportion equation
74,413.13 : 102,684.80 = 42,138.48 : x - Step 2: Convert to fraction form
74,413.13/102,684.80 = 42,138.48/x - Step 3: Cross multiply
74,413.13x = 102,684.80 × 42,138.48 - Step 4: Simplify right side
74,413.13x = 4,326,981,391.10 - Step 5: Solve for x
x = 4,326,981,391.10/74,413.13 - Step 6: Final answer
x = 58,148.09
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Why These Related Problems?
These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.