Finding the Fourth Proportional to 74,121.40, 102,287.60 and 40,129.91
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Solution
The fourth proportional to 74,121.40, 102,287.60 and 40,129.91 is: 55,379.32
Step by Step Solution
- Step 1: Write the proportion equation
74,121.40 : 102,287.60 = 40,129.91 : x - Step 2: Convert to fraction form
74,121.40/102,287.60 = 40,129.91/x - Step 3: Cross multiply
74,121.40x = 102,287.60 × 40,129.91 - Step 4: Simplify right side
74,121.40x = 4,104,792,237.19 - Step 5: Solve for x
x = 4,104,792,237.19/74,121.40 - Step 6: Final answer
x = 55,379.32
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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.