Finding the Fourth Proportional to 178.60, 267.70 and 87.19
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Solution
The fourth proportional to 178.60, 267.70 and 87.19 is: 130.69
Step by Step Solution
- Step 1: Write the proportion equation
178.60 : 267.70 = 87.19 : x - Step 2: Convert to fraction form
178.60/267.70 = 87.19/x - Step 3: Cross multiply
178.60x = 267.70 × 87.19 - Step 4: Simplify right side
178.60x = 23,340.76 - Step 5: Solve for x
x = 23,340.76/178.60 - Step 6: Final answer
x = 130.69
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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.