Finding the Fourth Proportional to 129,062,909.84, 177,905,135.16 and 87,738,057.68
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Solution
The fourth proportional to 129,062,909.84, 177,905,135.16 and 87,738,057.68 is: 120,941,415.54
Step by Step Solution
- Step 1: Write the proportion equation
129,062,909.84 : 177,905,135.16 = 87,738,057.68 : x - Step 2: Convert to fraction form
129,062,909.84/177,905,135.16 = 87,738,057.68/x - Step 3: Cross multiply
129,062,909.84x = 177,905,135.16 × 87,738,057.68 - Step 4: Simplify right side
129,062,909.84x = 15,609,051,010,236,276 - Step 5: Solve for x
x = 15,609,051,010,236,276/129,062,909.84 - Step 6: Final answer
x = 120,941,415.54
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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.