Finding the Fourth Proportional to 77,290.26, 115,916.76 and 21,130.62
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Solution
The fourth proportional to 77,290.26, 115,916.76 and 21,130.62 is: 31,690.84
Step by Step Solution
- Step 1: Write the proportion equation
77,290.26 : 115,916.76 = 21,130.62 : x - Step 2: Convert to fraction form
77,290.26/115,916.76 = 21,130.62/x - Step 3: Cross multiply
77,290.26x = 115,916.76 × 21,130.62 - Step 4: Simplify right side
77,290.26x = 2,449,393,007.19 - Step 5: Solve for x
x = 2,449,393,007.19/77,290.26 - Step 6: Final answer
x = 31,690.84
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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.