Finding the Fourth Proportional to 129,509,341.20, 194,012,069.40 and 78,239,062.80
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Solution
The fourth proportional to 129,509,341.20, 194,012,069.40 and 78,239,062.80 is: 117,206,390.99
Step by Step Solution
- Step 1: Write the proportion equation
129,509,341.20 : 194,012,069.40 = 78,239,062.80 : x - Step 2: Convert to fraction form
129,509,341.20/194,012,069.40 = 78,239,062.80/x - Step 3: Cross multiply
129,509,341.20x = 194,012,069.40 × 78,239,062.80 - Step 4: Simplify right side
129,509,341.20x = 15,179,322,481,744,558 - Step 5: Solve for x
x = 15,179,322,481,744,558/129,509,341.20 - Step 6: Final answer
x = 117,206,390.99
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These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.