Finding the Fourth Proportional to 129,868,371.42, 179,218,449.21 and 70,330,129.80
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Solution
The fourth proportional to 129,868,371.42, 179,218,449.21 and 70,330,129.80 is: 97,055,631.46
Step by Step Solution
- Step 1: Write the proportion equation
129,868,371.42 : 179,218,449.21 = 70,330,129.80 : x - Step 2: Convert to fraction form
129,868,371.42/179,218,449.21 = 70,330,129.80/x - Step 3: Cross multiply
129,868,371.42x = 179,218,449.21 × 70,330,129.80 - Step 4: Simplify right side
129,868,371.42x = 12,604,456,795,494,008 - Step 5: Solve for x
x = 12,604,456,795,494,008/129,868,371.42 - Step 6: Final answer
x = 97,055,631.46
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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.