Finding the Fourth Proportional to 102.05, 153.09 and 86.99
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Solution
The fourth proportional to 102.05, 153.09 and 86.99 is: 130.50
Step by Step Solution
- Step 1: Write the proportion equation
102.05 : 153.09 = 86.99 : x - Step 2: Convert to fraction form
102.05/153.09 = 86.99/x - Step 3: Cross multiply
102.05x = 153.09 × 86.99 - Step 4: Simplify right side
102.05x = 13,316.53 - Step 5: Solve for x
x = 13,316.53/102.05 - Step 6: Final answer
x = 130.50
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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.