Finding the Fourth Proportional to 129.79, 178.70 and 110.07
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Solution
The fourth proportional to 129.79, 178.70 and 110.07 is: 151.55
Step by Step Solution
- Step 1: Write the proportion equation
129.79 : 178.70 = 110.07 : x - Step 2: Convert to fraction form
129.79/178.70 = 110.07/x - Step 3: Cross multiply
129.79x = 178.70 × 110.07 - Step 4: Simplify right side
129.79x = 19,669.63 - Step 5: Solve for x
x = 19,669.63/129.79 - Step 6: Final answer
x = 151.55
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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.