Finding the Fourth Proportional to 121,408.60, 182,112.90 and 74,687.80
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Solution
The fourth proportional to 121,408.60, 182,112.90 and 74,687.80 is: 112,031.70
Step by Step Solution
- Step 1: Write the proportion equation
121,408.60 : 182,112.90 = 74,687.80 : x - Step 2: Convert to fraction form
121,408.60/182,112.90 = 74,687.80/x - Step 3: Cross multiply
121,408.60x = 182,112.90 × 74,687.80 - Step 4: Simplify right side
121,408.60x = 13,601,611,852.62 - Step 5: Solve for x
x = 13,601,611,852.62/121,408.60 - Step 6: Final answer
x = 112,031.70
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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.