Finding the Fourth Proportional to 122.76, 184.14 and 86.99
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Solution
The fourth proportional to 122.76, 184.14 and 86.99 is: 130.49
Step by Step Solution
- Step 1: Write the proportion equation
122.76 : 184.14 = 86.99 : x - Step 2: Convert to fraction form
122.76/184.14 = 86.99/x - Step 3: Cross multiply
122.76x = 184.14 × 86.99 - Step 4: Simplify right side
122.76x = 16,018.34 - Step 5: Solve for x
x = 16,018.34/122.76 - Step 6: Final answer
x = 130.49
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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.