Finding the Fourth Proportional to 77.65, 107.35 and 63.99
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Solution
The fourth proportional to 77.65, 107.35 and 63.99 is: 88.47
Step by Step Solution
- Step 1: Write the proportion equation
77.65 : 107.35 = 63.99 : x - Step 2: Convert to fraction form
77.65/107.35 = 63.99/x - Step 3: Cross multiply
77.65x = 107.35 × 63.99 - Step 4: Simplify right side
77.65x = 6,869.17 - Step 5: Solve for x
x = 6,869.17/77.65 - Step 6: Final answer
x = 88.47
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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.