Finding the Fourth Proportional to 120,138.68, 165,803.46 and 66,427.76
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Solution
The fourth proportional to 120,138.68, 165,803.46 and 66,427.76 is: 91,676.99
Step by Step Solution
- Step 1: Write the proportion equation
120,138.68 : 165,803.46 = 66,427.76 : x - Step 2: Convert to fraction form
120,138.68/165,803.46 = 66,427.76/x - Step 3: Cross multiply
120,138.68x = 165,803.46 × 66,427.76 - Step 4: Simplify right side
120,138.68x = 11,013,952,448.05 - Step 5: Solve for x
x = 11,013,952,448.05/120,138.68 - Step 6: Final answer
x = 91,676.99
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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.