Finding the Fourth Proportional to 136,140.09, 187,845.75 and 79,540.53
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Solution
The fourth proportional to 136,140.09, 187,845.75 and 79,540.53 is: 109,749.82
Step by Step Solution
- Step 1: Write the proportion equation
136,140.09 : 187,845.75 = 79,540.53 : x - Step 2: Convert to fraction form
136,140.09/187,845.75 = 79,540.53/x - Step 3: Cross multiply
136,140.09x = 187,845.75 × 79,540.53 - Step 4: Simplify right side
136,140.09x = 14,941,350,513.25 - Step 5: Solve for x
x = 14,941,350,513.25/136,140.09 - Step 6: Final answer
x = 109,749.82
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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.