Finding the Fourth Proportional to 135.13, 186.48 and 76.91
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Solution
The fourth proportional to 135.13, 186.48 and 76.91 is: 106.14
Step by Step Solution
- Step 1: Write the proportion equation
135.13 : 186.48 = 76.91 : x - Step 2: Convert to fraction form
135.13/186.48 = 76.91/x - Step 3: Cross multiply
135.13x = 186.48 × 76.91 - Step 4: Simplify right side
135.13x = 14,342.18 - Step 5: Solve for x
x = 14,342.18/135.13 - Step 6: Final answer
x = 106.14
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Why These Related Problems?
These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.