Finding the Fourth Proportional to 138,458.30, 191,072.62 and 74,796.09
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Solution
The fourth proportional to 138,458.30, 191,072.62 and 74,796.09 is: 103,218.70
Step by Step Solution
- Step 1: Write the proportion equation
138,458.30 : 191,072.62 = 74,796.09 : x - Step 2: Convert to fraction form
138,458.30/191,072.62 = 74,796.09/x - Step 3: Cross multiply
138,458.30x = 191,072.62 × 74,796.09 - Step 4: Simplify right side
138,458.30x = 14,291,485,692.07 - Step 5: Solve for x
x = 14,291,485,692.07/138,458.30 - Step 6: Final answer
x = 103,218.70
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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.