Finding the Fourth Proportional to 212,653,262.80, 318,979,894.20 and 115,907,381.20
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Solution
The fourth proportional to 212,653,262.80, 318,979,894.20 and 115,907,381.20 is: 173,861,071.80
Step by Step Solution
- Step 1: Write the proportion equation
212,653,262.80 : 318,979,894.20 = 115,907,381.20 : x - Step 2: Convert to fraction form
212,653,262.80/318,979,894.20 = 115,907,381.20/x - Step 3: Cross multiply
212,653,262.80x = 318,979,894.20 × 115,907,381.20 - Step 4: Simplify right side
212,653,262.80x = 36,972,124,192,175,072 - Step 5: Solve for x
x = 36,972,124,192,175,072/212,653,262.80 - Step 6: Final answer
x = 173,861,071.80
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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.