Finding the Fourth Proportional to 103.50, 155.16 and 72.99
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Solution
The fourth proportional to 103.50, 155.16 and 72.99 is: 109.42
Step by Step Solution
- Step 1: Write the proportion equation
103.50 : 155.16 = 72.99 : x - Step 2: Convert to fraction form
103.50/155.16 = 72.99/x - Step 3: Cross multiply
103.50x = 155.16 × 72.99 - Step 4: Simplify right side
103.50x = 11,325.13 - Step 5: Solve for x
x = 11,325.13/103.50 - Step 6: Final answer
x = 109.42
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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.