Finding the Fourth Proportional to 85,436.16, 117,890.88 and 49,135.68
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Solution
The fourth proportional to 85,436.16, 117,890.88 and 49,135.68 is: 67,800.90
Step by Step Solution
- Step 1: Write the proportion equation
85,436.16 : 117,890.88 = 49,135.68 : x - Step 2: Convert to fraction form
85,436.16/117,890.88 = 49,135.68/x - Step 3: Cross multiply
85,436.16x = 117,890.88 × 49,135.68 - Step 4: Simplify right side
85,436.16x = 5,792,648,554.60 - Step 5: Solve for x
x = 5,792,648,554.60/85,436.16 - Step 6: Final answer
x = 67,800.90
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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.