Finding the Fourth Proportional to 149,980.20, 206,972.78 and 81,996.09
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Solution
The fourth proportional to 149,980.20, 206,972.78 and 81,996.09 is: 113,154.66
Step by Step Solution
- Step 1: Write the proportion equation
149,980.20 : 206,972.78 = 81,996.09 : x - Step 2: Convert to fraction form
149,980.20/206,972.78 = 81,996.09/x - Step 3: Cross multiply
149,980.20x = 206,972.78 × 81,996.09 - Step 4: Simplify right side
149,980.20x = 16,970,958,696.43 - Step 5: Solve for x
x = 16,970,958,696.43/149,980.20 - Step 6: Final answer
x = 113,154.66
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1.5x scale
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.