Finding the Fourth Proportional to 135.14, 202.55 and 91.80
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Solution
The fourth proportional to 135.14, 202.55 and 91.80 is: 137.59
Step by Step Solution
- Step 1: Write the proportion equation
135.14 : 202.55 = 91.80 : x - Step 2: Convert to fraction form
135.14/202.55 = 91.80/x - Step 3: Cross multiply
135.14x = 202.55 × 91.80 - Step 4: Simplify right side
135.14x = 18,593.63 - Step 5: Solve for x
x = 18,593.63/135.14 - Step 6: Final answer
x = 137.59
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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.