Finding the Fourth Proportional to 108.07, 148.93 and 76.99
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Solution
The fourth proportional to 108.07, 148.93 and 76.99 is: 106.10
Step by Step Solution
- Step 1: Write the proportion equation
108.07 : 148.93 = 76.99 : x - Step 2: Convert to fraction form
108.07/148.93 = 76.99/x - Step 3: Cross multiply
108.07x = 148.93 × 76.99 - Step 4: Simplify right side
108.07x = 11,465.38 - Step 5: Solve for x
x = 11,465.38/108.07 - Step 6: Final answer
x = 106.10
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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.