Finding the Fourth Proportional to 93.92, 129.64 and 79.36
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Solution
The fourth proportional to 93.92, 129.64 and 79.36 is: 109.54
Step by Step Solution
- Step 1: Write the proportion equation
93.92 : 129.64 = 79.36 : x - Step 2: Convert to fraction form
93.92/129.64 = 79.36/x - Step 3: Cross multiply
93.92x = 129.64 × 79.36 - Step 4: Simplify right side
93.92x = 10,288.23 - Step 5: Solve for x
x = 10,288.23/93.92 - Step 6: Final answer
x = 109.54
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Why These Related Problems?
These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.