Finding the Fourth Proportional to 86,206,871.80, 129,310,307.70 and 81,955,343.80
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Solution
The fourth proportional to 86,206,871.80, 129,310,307.70 and 81,955,343.80 is: 122,933,015.70
Step by Step Solution
- Step 1: Write the proportion equation
86,206,871.80 : 129,310,307.70 = 81,955,343.80 : x - Step 2: Convert to fraction form
86,206,871.80/129,310,307.70 = 81,955,343.80/x - Step 3: Cross multiply
86,206,871.80x = 129,310,307.70 × 81,955,343.80 - Step 4: Simplify right side
86,206,871.80x = 10,597,670,724,437,288 - Step 5: Solve for x
x = 10,597,670,724,437,288/86,206,871.80 - Step 6: Final answer
x = 122,933,015.70
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Why These Related Problems?
These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.