Finding the Fourth Proportional to 132,218,965.80, 198,328,448.70 and 78,471,253.80
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Solution
The fourth proportional to 132,218,965.80, 198,328,448.70 and 78,471,253.80 is: 117,706,880.70
Step by Step Solution
- Step 1: Write the proportion equation
132,218,965.80 : 198,328,448.70 = 78,471,253.80 : x - Step 2: Convert to fraction form
132,218,965.80/198,328,448.70 = 78,471,253.80/x - Step 3: Cross multiply
132,218,965.80x = 198,328,448.70 × 78,471,253.80 - Step 4: Simplify right side
132,218,965.80x = 15,563,082,033,697,978 - Step 5: Solve for x
x = 15,563,082,033,697,978/132,218,965.80 - Step 6: Final answer
x = 117,706,880.70
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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.