Finding the Fourth Proportional to 77,193.64, 115,731.08 and 39,211.70
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Solution
The fourth proportional to 77,193.64, 115,731.08 and 39,211.70 is: 58,787.39
Step by Step Solution
- Step 1: Write the proportion equation
77,193.64 : 115,731.08 = 39,211.70 : x - Step 2: Convert to fraction form
77,193.64/115,731.08 = 39,211.70/x - Step 3: Cross multiply
77,193.64x = 115,731.08 × 39,211.70 - Step 4: Simplify right side
77,193.64x = 4,538,012,389.64 - Step 5: Solve for x
x = 4,538,012,389.64/77,193.64 - Step 6: Final answer
x = 58,787.39
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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.