Finding the Fourth Proportional to 89.68, 133.95 and 76.02
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Solution
The fourth proportional to 89.68, 133.95 and 76.02 is: 113.55
Step by Step Solution
- Step 1: Write the proportion equation
89.68 : 133.95 = 76.02 : x - Step 2: Convert to fraction form
89.68/133.95 = 76.02/x - Step 3: Cross multiply
89.68x = 133.95 × 76.02 - Step 4: Simplify right side
89.68x = 10,182.88 - Step 5: Solve for x
x = 10,182.88/89.68 - Step 6: Final answer
x = 113.55
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Why These Related Problems?
These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.