Finding the Fourth Proportional to 138,340.08, 190,907.28 and 77,910.84
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Solution
The fourth proportional to 138,340.08, 190,907.28 and 77,910.84 is: 107,515.82
Step by Step Solution
- Step 1: Write the proportion equation
138,340.08 : 190,907.28 = 77,910.84 : x - Step 2: Convert to fraction form
138,340.08/190,907.28 = 77,910.84/x - Step 3: Cross multiply
138,340.08x = 190,907.28 × 77,910.84 - Step 4: Simplify right side
138,340.08x = 14,873,746,546.92 - Step 5: Solve for x
x = 14,873,746,546.92/138,340.08 - Step 6: Final answer
x = 107,515.82
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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.