Finding the Fourth Proportional to 212,813,197.20, 319,219,795.80 and 115,731,392.40
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Solution
The fourth proportional to 212,813,197.20, 319,219,795.80 and 115,731,392.40 is: 173,597,088.60
Step by Step Solution
- Step 1: Write the proportion equation
212,813,197.20 : 319,219,795.80 = 115,731,392.40 : x - Step 2: Convert to fraction form
212,813,197.20/319,219,795.80 = 115,731,392.40/x - Step 3: Cross multiply
212,813,197.20x = 319,219,795.80 × 115,731,392.40 - Step 4: Simplify right side
212,813,197.20x = 36,943,751,449,577,672 - Step 5: Solve for x
x = 36,943,751,449,577,672/212,813,197.20 - Step 6: Final answer
x = 173,597,088.60
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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.