Finding the Fourth Proportional to 135.28, 203.12 and 74.40
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Solution
The fourth proportional to 135.28, 203.12 and 74.40 is: 111.71
Step by Step Solution
- Step 1: Write the proportion equation
135.28 : 203.12 = 74.40 : x - Step 2: Convert to fraction form
135.28/203.12 = 74.40/x - Step 3: Cross multiply
135.28x = 203.12 × 74.40 - Step 4: Simplify right side
135.28x = 15,112.13 - Step 5: Solve for x
x = 15,112.13/135.28 - Step 6: Final answer
x = 111.71
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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.