Finding the Fourth Proportional to 72.68, 108.90 and 48.68
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Solution
The fourth proportional to 72.68, 108.90 and 48.68 is: 72.94
Step by Step Solution
- Step 1: Write the proportion equation
72.68 : 108.90 = 48.68 : x - Step 2: Convert to fraction form
72.68/108.90 = 48.68/x - Step 3: Cross multiply
72.68x = 108.90 × 48.68 - Step 4: Simplify right side
72.68x = 5,301.25 - Step 5: Solve for x
x = 5,301.25/72.68 - Step 6: Final answer
x = 72.94
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These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.