Finding the Fourth Proportional to 72.23, 99.57 and 59.99
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Solution
The fourth proportional to 72.23, 99.57 and 59.99 is: 82.70
Step by Step Solution
- Step 1: Write the proportion equation
72.23 : 99.57 = 59.99 : x - Step 2: Convert to fraction form
72.23/99.57 = 59.99/x - Step 3: Cross multiply
72.23x = 99.57 × 59.99 - Step 4: Simplify right side
72.23x = 5,973.20 - Step 5: Solve for x
x = 5,973.20/72.23 - Step 6: Final answer
x = 82.70
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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.