Finding the Fourth Proportional to 122.60, 169.08 and 115.76
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Solution
The fourth proportional to 122.60, 169.08 and 115.76 is: 159.65
Step by Step Solution
- Step 1: Write the proportion equation
122.60 : 169.08 = 115.76 : x - Step 2: Convert to fraction form
122.60/169.08 = 115.76/x - Step 3: Cross multiply
122.60x = 169.08 × 115.76 - Step 4: Simplify right side
122.60x = 19,572.70 - Step 5: Solve for x
x = 19,572.70/122.60 - Step 6: Final answer
x = 159.65
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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.