Finding the Fourth Proportional to 168,243,021.20, 252,364,531.80 and 72,504,909.20
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Solution
The fourth proportional to 168,243,021.20, 252,364,531.80 and 72,504,909.20 is: 108,757,363.80
Step by Step Solution
- Step 1: Write the proportion equation
168,243,021.20 : 252,364,531.80 = 72,504,909.20 : x - Step 2: Convert to fraction form
168,243,021.20/252,364,531.80 = 72,504,909.20/x - Step 3: Cross multiply
168,243,021.20x = 252,364,531.80 × 72,504,909.20 - Step 4: Simplify right side
168,243,021.20x = 18,297,667,463,459,516 - Step 5: Solve for x
x = 18,297,667,463,459,516/168,243,021.20 - Step 6: Final answer
x = 108,757,363.80
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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.