Finding the Fourth Proportional to 67.07, 100.59 and 30.99
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Solution
The fourth proportional to 67.07, 100.59 and 30.99 is: 46.48
Step by Step Solution
- Step 1: Write the proportion equation
67.07 : 100.59 = 30.99 : x - Step 2: Convert to fraction form
67.07/100.59 = 30.99/x - Step 3: Cross multiply
67.07x = 100.59 × 30.99 - Step 4: Simplify right side
67.07x = 3,117.28 - Step 5: Solve for x
x = 3,117.28/67.07 - Step 6: Final answer
x = 46.48
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Why These Related Problems?
These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.