Finding the Fourth Proportional to 133.40, 199.99 and 87.17
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Solution
The fourth proportional to 133.40, 199.99 and 87.17 is: 130.68
Step by Step Solution
- Step 1: Write the proportion equation
133.40 : 199.99 = 87.17 : x - Step 2: Convert to fraction form
133.40/199.99 = 87.17/x - Step 3: Cross multiply
133.40x = 199.99 × 87.17 - Step 4: Simplify right side
133.40x = 17,433.13 - Step 5: Solve for x
x = 17,433.13/133.40 - Step 6: Final answer
x = 130.68
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These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.