Finding the Fourth Proportional to 86.25, 129.28 and 40.02
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Solution
The fourth proportional to 86.25, 129.28 and 40.02 is: 59.99
Step by Step Solution
- Step 1: Write the proportion equation
86.25 : 129.28 = 40.02 : x - Step 2: Convert to fraction form
86.25/129.28 = 40.02/x - Step 3: Cross multiply
86.25x = 129.28 × 40.02 - Step 4: Simplify right side
86.25x = 5,173.81 - Step 5: Solve for x
x = 5,173.81/86.25 - Step 6: Final answer
x = 59.99
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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.