Finding the Fourth Proportional to 72.86, 100.49 and 47.99
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Solution
The fourth proportional to 72.86, 100.49 and 47.99 is: 66.18
Step by Step Solution
- Step 1: Write the proportion equation
72.86 : 100.49 = 47.99 : x - Step 2: Convert to fraction form
72.86/100.49 = 47.99/x - Step 3: Cross multiply
72.86x = 100.49 × 47.99 - Step 4: Simplify right side
72.86x = 4,821.77 - Step 5: Solve for x
x = 4,821.77/72.86 - Step 6: Final answer
x = 66.18
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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.