Finding the Fourth Proportional to 72.08, 99.46 and 40.99
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Solution
The fourth proportional to 72.08, 99.46 and 40.99 is: 56.56
Step by Step Solution
- Step 1: Write the proportion equation
72.08 : 99.46 = 40.99 : x - Step 2: Convert to fraction form
72.08/99.46 = 40.99/x - Step 3: Cross multiply
72.08x = 99.46 × 40.99 - Step 4: Simplify right side
72.08x = 4,076.87 - Step 5: Solve for x
x = 4,076.87/72.08 - Step 6: Final answer
x = 56.56
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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.