Finding the Fourth Proportional to 129.76, 193.68 and 125.68
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Solution
The fourth proportional to 129.76, 193.68 and 125.68 is: 187.59
Step by Step Solution
- Step 1: Write the proportion equation
129.76 : 193.68 = 125.68 : x - Step 2: Convert to fraction form
129.76/193.68 = 125.68/x - Step 3: Cross multiply
129.76x = 193.68 × 125.68 - Step 4: Simplify right side
129.76x = 24,341.70 - Step 5: Solve for x
x = 24,341.70/129.76 - Step 6: Final answer
x = 187.59
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Why These Related Problems?
These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.