Finding the Fourth Proportional to 87.40, 130.99 and 51.26
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Solution
The fourth proportional to 87.40, 130.99 and 51.26 is: 76.82
Step by Step Solution
- Step 1: Write the proportion equation
87.40 : 130.99 = 51.26 : x - Step 2: Convert to fraction form
87.40/130.99 = 51.26/x - Step 3: Cross multiply
87.40x = 130.99 × 51.26 - Step 4: Simplify right side
87.40x = 6,714.37 - Step 5: Solve for x
x = 6,714.37/87.40 - Step 6: Final answer
x = 76.82
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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.