Finding the Fourth Proportional to 75.30, 112.36 and 70.08
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Solution
The fourth proportional to 75.30, 112.36 and 70.08 is: 104.57
Step by Step Solution
- Step 1: Write the proportion equation
75.30 : 112.36 = 70.08 : x - Step 2: Convert to fraction form
75.30/112.36 = 70.08/x - Step 3: Cross multiply
75.30x = 112.36 × 70.08 - Step 4: Simplify right side
75.30x = 7,874.19 - Step 5: Solve for x
x = 7,874.19/75.30 - Step 6: Final answer
x = 104.57
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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.