Finding the Fourth Proportional to 135.18, 202.68 and 81
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Solution
The fourth proportional to 135.18, 202.68 and 81 is: 121.45
Step by Step Solution
- Step 1: Write the proportion equation
135.18 : 202.68 = 81 : x - Step 2: Convert to fraction form
135.18/202.68 = 81/x - Step 3: Cross multiply
135.18x = 202.68 × 81 - Step 4: Simplify right side
135.18x = 16,417.08 - Step 5: Solve for x
x = 16,417.08/135.18 - Step 6: Final answer
x = 121.45
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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.