Finding the Fourth Proportional to 128,589,026.21, 177,431,820.79 and 75,710,294.96
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Solution
The fourth proportional to 128,589,026.21, 177,431,820.79 and 75,710,294.96 is: 104,467,821.89
Step by Step Solution
- Step 1: Write the proportion equation
128,589,026.21 : 177,431,820.79 = 75,710,294.96 : x - Step 2: Convert to fraction form
128,589,026.21/177,431,820.79 = 75,710,294.96/x - Step 3: Cross multiply
128,589,026.21x = 177,431,820.79 × 75,710,294.96 - Step 4: Simplify right side
128,589,026.21x = 13,433,415,487,300,758 - Step 5: Solve for x
x = 13,433,415,487,300,758/128,589,026.21 - Step 6: Final answer
x = 104,467,821.89
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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.