Finding the Fourth Proportional to 130.68, 180.33 and 72.46
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Solution
The fourth proportional to 130.68, 180.33 and 72.46 is: 99.99
Step by Step Solution
- Step 1: Write the proportion equation
130.68 : 180.33 = 72.46 : x - Step 2: Convert to fraction form
130.68/180.33 = 72.46/x - Step 3: Cross multiply
130.68x = 180.33 × 72.46 - Step 4: Simplify right side
130.68x = 13,066.67 - Step 5: Solve for x
x = 13,066.67/130.68 - Step 6: Final answer
x = 99.99
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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.