Finding the Fourth Proportional to 128,378,365.44, 177,119,043.84 and 73,335,240.96
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Solution
The fourth proportional to 128,378,365.44, 177,119,043.84 and 73,335,240.96 is: 101,178,011.69
Step by Step Solution
- Step 1: Write the proportion equation
128,378,365.44 : 177,119,043.84 = 73,335,240.96 : x - Step 2: Convert to fraction form
128,378,365.44/177,119,043.84 = 73,335,240.96/x - Step 3: Cross multiply
128,378,365.44x = 177,119,043.84 × 73,335,240.96 - Step 4: Simplify right side
128,378,365.44x = 12,989,067,758,611,202 - Step 5: Solve for x
x = 12,989,067,758,611,202/128,378,365.44 - Step 6: Final answer
x = 101,178,011.69
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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.