Finding the Fourth Proportional to 93.60, 129.84 and 84.96
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Solution
The fourth proportional to 93.60, 129.84 and 84.96 is: 117.85
Step by Step Solution
- Step 1: Write the proportion equation
93.60 : 129.84 = 84.96 : x - Step 2: Convert to fraction form
93.60/129.84 = 84.96/x - Step 3: Cross multiply
93.60x = 129.84 × 84.96 - Step 4: Simplify right side
93.60x = 11,031.21 - Step 5: Solve for x
x = 11,031.21/93.60 - Step 6: Final answer
x = 117.85
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Why These Related Problems?
These problems maintain the same ratio (1.39) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.