Finding the Fourth Proportional to 138,386.18, 190,972.08 and 77,976.28
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Solution
The fourth proportional to 138,386.18, 190,972.08 and 77,976.28 is: 107,606.79
Step by Step Solution
- Step 1: Write the proportion equation
138,386.18 : 190,972.08 = 77,976.28 : x - Step 2: Convert to fraction form
138,386.18/190,972.08 = 77,976.28/x - Step 3: Cross multiply
138,386.18x = 190,972.08 × 77,976.28 - Step 4: Simplify right side
138,386.18x = 14,891,292,382.26 - Step 5: Solve for x
x = 14,891,292,382.26/138,386.18 - Step 6: Final answer
x = 107,606.79
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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.