Finding the Fourth Proportional to 118,170.78, 163,046.52 and 72,218.70
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Solution
The fourth proportional to 118,170.78, 163,046.52 and 72,218.70 is: 99,643.99
Step by Step Solution
- Step 1: Write the proportion equation
118,170.78 : 163,046.52 = 72,218.70 : x - Step 2: Convert to fraction form
118,170.78/163,046.52 = 72,218.70/x - Step 3: Cross multiply
118,170.78x = 163,046.52 × 72,218.70 - Step 4: Simplify right side
118,170.78x = 11,775,007,713.92 - Step 5: Solve for x
x = 11,775,007,713.92/118,170.78 - Step 6: Final answer
x = 99,643.99
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Why These Related Problems?
These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.