Finding the Fourth Proportional to 72.08, 99.49 and 42.99
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Solution
The fourth proportional to 72.08, 99.49 and 42.99 is: 59.34
Step by Step Solution
- Step 1: Write the proportion equation
72.08 : 99.49 = 42.99 : x - Step 2: Convert to fraction form
72.08/99.49 = 42.99/x - Step 3: Cross multiply
72.08x = 99.49 × 42.99 - Step 4: Simplify right side
72.08x = 4,277.08 - Step 5: Solve for x
x = 4,277.08/72.08 - Step 6: Final answer
x = 59.34
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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.