Finding the Fourth Proportional to 75.18, 112.26 and 66.08
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Solution
The fourth proportional to 75.18, 112.26 and 66.08 is: 98.66
Step by Step Solution
- Step 1: Write the proportion equation
75.18 : 112.26 = 66.08 : x - Step 2: Convert to fraction form
75.18/112.26 = 66.08/x - Step 3: Cross multiply
75.18x = 112.26 × 66.08 - Step 4: Simplify right side
75.18x = 7,417.58 - Step 5: Solve for x
x = 7,417.58/75.18 - Step 6: Final answer
x = 98.66
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Why These Related Problems?
These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.