Finding the Fourth Proportional to 178.58, 267.93 and 87.18
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Solution
The fourth proportional to 178.58, 267.93 and 87.18 is: 130.80
Step by Step Solution
- Step 1: Write the proportion equation
178.58 : 267.93 = 87.18 : x - Step 2: Convert to fraction form
178.58/267.93 = 87.18/x - Step 3: Cross multiply
178.58x = 267.93 × 87.18 - Step 4: Simplify right side
178.58x = 23,358.14 - Step 5: Solve for x
x = 23,358.14/178.58 - Step 6: Final answer
x = 130.80
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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.