Finding the Fourth Proportional to 130.93, 180.68 and 81.79
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Solution
The fourth proportional to 130.93, 180.68 and 81.79 is: 112.86
Step by Step Solution
- Step 1: Write the proportion equation
130.93 : 180.68 = 81.79 : x - Step 2: Convert to fraction form
130.93/180.68 = 81.79/x - Step 3: Cross multiply
130.93x = 180.68 × 81.79 - Step 4: Simplify right side
130.93x = 14,776.96 - Step 5: Solve for x
x = 14,776.96/130.93 - Step 6: Final answer
x = 112.86
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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.