Finding the Fourth Proportional to 88.05, 121.49 and 55.31
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Solution
The fourth proportional to 88.05, 121.49 and 55.31 is: 76.31
Step by Step Solution
- Step 1: Write the proportion equation
88.05 : 121.49 = 55.31 : x - Step 2: Convert to fraction form
88.05/121.49 = 55.31/x - Step 3: Cross multiply
88.05x = 121.49 × 55.31 - Step 4: Simplify right side
88.05x = 6,719.03 - Step 5: Solve for x
x = 6,719.03/88.05 - Step 6: Final answer
x = 76.31
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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.