Finding the Fourth Proportional to 97.11, 145.74 and 86.99
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Solution
The fourth proportional to 97.11, 145.74 and 86.99 is: 130.55
Step by Step Solution
- Step 1: Write the proportion equation
97.11 : 145.74 = 86.99 : x - Step 2: Convert to fraction form
97.11/145.74 = 86.99/x - Step 3: Cross multiply
97.11x = 145.74 × 86.99 - Step 4: Simplify right side
97.11x = 12,677.92 - Step 5: Solve for x
x = 12,677.92/97.11 - Step 6: Final answer
x = 130.55
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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.