Finding the Fourth Proportional to 139,837.78, 192,977.40 and 82,478.44
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Solution
The fourth proportional to 139,837.78, 192,977.40 and 82,478.44 is: 113,820.99
Step by Step Solution
- Step 1: Write the proportion equation
139,837.78 : 192,977.40 = 82,478.44 : x - Step 2: Convert to fraction form
139,837.78/192,977.40 = 82,478.44/x - Step 3: Cross multiply
139,837.78x = 192,977.40 × 82,478.44 - Step 4: Simplify right side
139,837.78x = 15,916,474,907.26 - Step 5: Solve for x
x = 15,916,474,907.26/139,837.78 - Step 6: Final answer
x = 113,820.99
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1.5x scale
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.