Finding the Fourth Proportional to 135.08, 202.40 and 86.88
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Solution
The fourth proportional to 135.08, 202.40 and 86.88 is: 130.18
Step by Step Solution
- Step 1: Write the proportion equation
135.08 : 202.40 = 86.88 : x - Step 2: Convert to fraction form
135.08/202.40 = 86.88/x - Step 3: Cross multiply
135.08x = 202.40 × 86.88 - Step 4: Simplify right side
135.08x = 17,584.73 - Step 5: Solve for x
x = 17,584.73/135.08 - Step 6: Final answer
x = 130.18
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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.