Finding the Fourth Proportional to 129,721,835.20, 179,016,129.84 and 70,984,498.09
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Solution
The fourth proportional to 129,721,835.20, 179,016,129.84 and 70,984,498.09 is: 97,958,605.87
Step by Step Solution
- Step 1: Write the proportion equation
129,721,835.20 : 179,016,129.84 = 70,984,498.09 : x - Step 2: Convert to fraction form
129,721,835.20/179,016,129.84 = 70,984,498.09/x - Step 3: Cross multiply
129,721,835.20x = 179,016,129.84 × 70,984,498.09 - Step 4: Simplify right side
129,721,835.20x = 12,707,370,126,706,672 - Step 5: Solve for x
x = 12,707,370,126,706,672/129,721,835.20 - Step 6: Final answer
x = 97,958,605.87
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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.