Finding the Fourth Proportional to 87.95, 120.99 and 74.18
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Solution
The fourth proportional to 87.95, 120.99 and 74.18 is: 102.05
Step by Step Solution
- Step 1: Write the proportion equation
87.95 : 120.99 = 74.18 : x - Step 2: Convert to fraction form
87.95/120.99 = 74.18/x - Step 3: Cross multiply
87.95x = 120.99 × 74.18 - Step 4: Simplify right side
87.95x = 8,975.62 - Step 5: Solve for x
x = 8,975.62/87.95 - Step 6: Final answer
x = 102.05
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These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.