Finding the Fourth Proportional to 128,589,025.21, 177,431,819.41 and 75,710,293.96
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Solution
The fourth proportional to 128,589,025.21, 177,431,819.41 and 75,710,293.96 is: 104,467,820.51
Step by Step Solution
- Step 1: Write the proportion equation
128,589,025.21 : 177,431,819.41 = 75,710,293.96 : x - Step 2: Convert to fraction form
128,589,025.21/177,431,819.41 = 75,710,293.96/x - Step 3: Cross multiply
128,589,025.21x = 177,431,819.41 × 75,710,293.96 - Step 4: Simplify right side
128,589,025.21x = 13,433,415,205,388,732 - Step 5: Solve for x
x = 13,433,415,205,388,732/128,589,025.21 - Step 6: Final answer
x = 104,467,820.51
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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.