Finding the Fourth Proportional to 122,156.20, 168,584.87 and 76,872.99
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Solution
The fourth proportional to 122,156.20, 168,584.87 and 76,872.99 is: 106,090.59
Step by Step Solution
- Step 1: Write the proportion equation
122,156.20 : 168,584.87 = 76,872.99 : x - Step 2: Convert to fraction form
122,156.20/168,584.87 = 76,872.99/x - Step 3: Cross multiply
122,156.20x = 168,584.87 × 76,872.99 - Step 4: Simplify right side
122,156.20x = 12,959,623,217.84 - Step 5: Solve for x
x = 12,959,623,217.84/122,156.20 - Step 6: Final answer
x = 106,090.59
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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.