Finding the Fourth Proportional to 78,319.10, 117,330.69 and 60,702.68
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Solution
The fourth proportional to 78,319.10, 117,330.69 and 60,702.68 is: 90,939.34
Step by Step Solution
- Step 1: Write the proportion equation
78,319.10 : 117,330.69 = 60,702.68 : x - Step 2: Convert to fraction form
78,319.10/117,330.69 = 60,702.68/x - Step 3: Cross multiply
78,319.10x = 117,330.69 × 60,702.68 - Step 4: Simplify right side
78,319.10x = 7,122,287,850.21 - Step 5: Solve for x
x = 7,122,287,850.21/78,319.10 - Step 6: Final answer
x = 90,939.34
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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.