Finding the Fourth Proportional to 88.80, 133.08 and 71.70
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Solution
The fourth proportional to 88.80, 133.08 and 71.70 is: 107.45
Step by Step Solution
- Step 1: Write the proportion equation
88.80 : 133.08 = 71.70 : x - Step 2: Convert to fraction form
88.80/133.08 = 71.70/x - Step 3: Cross multiply
88.80x = 133.08 × 71.70 - Step 4: Simplify right side
88.80x = 9,541.84 - Step 5: Solve for x
x = 9,541.84/88.80 - Step 6: Final answer
x = 107.45
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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.