Finding the Fourth Proportional to 136,218.62, 187,976.95 and 74,959.08
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Solution
The fourth proportional to 136,218.62, 187,976.95 and 74,959.08 is: 103,440.92
Step by Step Solution
- Step 1: Write the proportion equation
136,218.62 : 187,976.95 = 74,959.08 : x - Step 2: Convert to fraction form
136,218.62/187,976.95 = 74,959.08/x - Step 3: Cross multiply
136,218.62x = 187,976.95 × 74,959.08 - Step 4: Simplify right side
136,218.62x = 14,090,579,045.81 - Step 5: Solve for x
x = 14,090,579,045.81/136,218.62 - Step 6: Final answer
x = 103,440.92
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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.