Finding the Fourth Proportional to 72.56, 100.14 and 65.99
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Solution
The fourth proportional to 72.56, 100.14 and 65.99 is: 91.07
Step by Step Solution
- Step 1: Write the proportion equation
72.56 : 100.14 = 65.99 : x - Step 2: Convert to fraction form
72.56/100.14 = 65.99/x - Step 3: Cross multiply
72.56x = 100.14 × 65.99 - Step 4: Simplify right side
72.56x = 6,608.24 - Step 5: Solve for x
x = 6,608.24/72.56 - Step 6: Final answer
x = 91.07
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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.