Finding the Fourth Proportional to 118.05, 175.58 and 117.78
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Solution
The fourth proportional to 118.05, 175.58 and 117.78 is: 175.17
Step by Step Solution
- Step 1: Write the proportion equation
118.05 : 175.58 = 117.78 : x - Step 2: Convert to fraction form
118.05/175.58 = 117.78/x - Step 3: Cross multiply
118.05x = 175.58 × 117.78 - Step 4: Simplify right side
118.05x = 20,679.22 - Step 5: Solve for x
x = 20,679.22/118.05 - Step 6: Final answer
x = 175.17
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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.