Finding the Fourth Proportional to 78,687.48, 117,366.99 and 66,060.12
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Solution
The fourth proportional to 78,687.48, 117,366.99 and 66,060.12 is: 98,532.54
Step by Step Solution
- Step 1: Write the proportion equation
78,687.48 : 117,366.99 = 66,060.12 : x - Step 2: Convert to fraction form
78,687.48/117,366.99 = 66,060.12/x - Step 3: Cross multiply
78,687.48x = 117,366.99 × 66,060.12 - Step 4: Simplify right side
78,687.48x = 7,753,277,443.44 - Step 5: Solve for x
x = 7,753,277,443.44/78,687.48 - Step 6: Final answer
x = 98,532.54
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Why These Related Problems?
These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.