Finding the Fourth Proportional to 72.11, 99.50 and 42.99
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Solution
The fourth proportional to 72.11, 99.50 and 42.99 is: 59.32
Step by Step Solution
- Step 1: Write the proportion equation
72.11 : 99.50 = 42.99 : x - Step 2: Convert to fraction form
72.11/99.50 = 42.99/x - Step 3: Cross multiply
72.11x = 99.50 × 42.99 - Step 4: Simplify right side
72.11x = 4,277.29 - Step 5: Solve for x
x = 4,277.29/72.11 - Step 6: Final answer
x = 59.32
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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.