Finding the Fourth Proportional to 87.48, 120.42 and 68.99
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Solution
The fourth proportional to 87.48, 120.42 and 68.99 is: 94.96
Step by Step Solution
- Step 1: Write the proportion equation
87.48 : 120.42 = 68.99 : x - Step 2: Convert to fraction form
87.48/120.42 = 68.99/x - Step 3: Cross multiply
87.48x = 120.42 × 68.99 - Step 4: Simplify right side
87.48x = 8,307.17 - Step 5: Solve for x
x = 8,307.17/87.48 - Step 6: Final answer
x = 94.96
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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.