Finding the Fourth Proportional to 212,605,845.20, 318,908,767.80 and 115,608,021.20
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Solution
The fourth proportional to 212,605,845.20, 318,908,767.80 and 115,608,021.20 is: 173,412,031.80
Step by Step Solution
- Step 1: Write the proportion equation
212,605,845.20 : 318,908,767.80 = 115,608,021.20 : x - Step 2: Convert to fraction form
212,605,845.20/318,908,767.80 = 115,608,021.20/x - Step 3: Cross multiply
212,605,845.20x = 318,908,767.80 × 115,608,021.20 - Step 4: Simplify right side
212,605,845.20x = 36,868,411,588,688,280 - Step 5: Solve for x
x = 36,868,411,588,688,280/212,605,845.20 - Step 6: Final answer
x = 173,412,031.80
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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.