Finding the Fourth Proportional to 72.08, 107.91 and 53.88
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Solution
The fourth proportional to 72.08, 107.91 and 53.88 is: 80.65
Step by Step Solution
- Step 1: Write the proportion equation
72.08 : 107.91 = 53.88 : x - Step 2: Convert to fraction form
72.08/107.91 = 53.88/x - Step 3: Cross multiply
72.08x = 107.91 × 53.88 - Step 4: Simplify right side
72.08x = 5,813.38 - Step 5: Solve for x
x = 5,813.38/72.08 - Step 6: Final answer
x = 80.65
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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.