Finding the Fourth Proportional to 87.65, 130.94 and 69.63
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Solution
The fourth proportional to 87.65, 130.94 and 69.63 is: 104.02
Step by Step Solution
- Step 1: Write the proportion equation
87.65 : 130.94 = 69.63 : x - Step 2: Convert to fraction form
87.65/130.94 = 69.63/x - Step 3: Cross multiply
87.65x = 130.94 × 69.63 - Step 4: Simplify right side
87.65x = 9,117.00 - Step 5: Solve for x
x = 9,117.00/87.65 - Step 6: Final answer
x = 104.02
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Why These Related Problems?
These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.