Finding the Fourth Proportional to 117,245.79, 161,791.50 and 74,799.75
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Solution
The fourth proportional to 117,245.79, 161,791.50 and 74,799.75 is: 103,218.75
Step by Step Solution
- Step 1: Write the proportion equation
117,245.79 : 161,791.50 = 74,799.75 : x - Step 2: Convert to fraction form
117,245.79/161,791.50 = 74,799.75/x - Step 3: Cross multiply
117,245.79x = 161,791.50 × 74,799.75 - Step 4: Simplify right side
117,245.79x = 12,101,963,752.13 - Step 5: Solve for x
x = 12,101,963,752.13/117,245.79 - Step 6: Final answer
x = 103,218.75
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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.