Finding the Fourth Proportional to 118.50, 177.80 and 79.99
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Solution
The fourth proportional to 118.50, 177.80 and 79.99 is: 120.02
Step by Step Solution
- Step 1: Write the proportion equation
118.50 : 177.80 = 79.99 : x - Step 2: Convert to fraction form
118.50/177.80 = 79.99/x - Step 3: Cross multiply
118.50x = 177.80 × 79.99 - Step 4: Simplify right side
118.50x = 14,221.38 - Step 5: Solve for x
x = 14,221.38/118.50 - Step 6: Final answer
x = 120.02
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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.