Finding the Fourth Proportional to 134.99, 202.49 and 87.20
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Solution
The fourth proportional to 134.99, 202.49 and 87.20 is: 130.80
Step by Step Solution
- Step 1: Write the proportion equation
134.99 : 202.49 = 87.20 : x - Step 2: Convert to fraction form
134.99/202.49 = 87.20/x - Step 3: Cross multiply
134.99x = 202.49 × 87.20 - Step 4: Simplify right side
134.99x = 17,657.53 - Step 5: Solve for x
x = 17,657.53/134.99 - Step 6: Final answer
x = 130.80
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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.