Finding the Fourth Proportional to 75,862.80, 104,690.60 and 42,328.80
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Solution
The fourth proportional to 75,862.80, 104,690.60 and 42,328.80 is: 58,413.71
Step by Step Solution
- Step 1: Write the proportion equation
75,862.80 : 104,690.60 = 42,328.80 : x - Step 2: Convert to fraction form
75,862.80/104,690.60 = 42,328.80/x - Step 3: Cross multiply
75,862.80x = 104,690.60 × 42,328.80 - Step 4: Simplify right side
75,862.80x = 4,431,427,469.28 - Step 5: Solve for x
x = 4,431,427,469.28/75,862.80 - Step 6: Final answer
x = 58,413.71
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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.