Finding the Fourth Proportional to 147.12, 202.99 and 91.84
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Solution
The fourth proportional to 147.12, 202.99 and 91.84 is: 126.72
Step by Step Solution
- Step 1: Write the proportion equation
147.12 : 202.99 = 91.84 : x - Step 2: Convert to fraction form
147.12/202.99 = 91.84/x - Step 3: Cross multiply
147.12x = 202.99 × 91.84 - Step 4: Simplify right side
147.12x = 18,642.60 - Step 5: Solve for x
x = 18,642.60/147.12 - Step 6: Final answer
x = 126.72
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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.