Finding the Fourth Proportional to 78.47, 108.23 and 59.99
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Solution
The fourth proportional to 78.47, 108.23 and 59.99 is: 82.74
Step by Step Solution
- Step 1: Write the proportion equation
78.47 : 108.23 = 59.99 : x - Step 2: Convert to fraction form
78.47/108.23 = 59.99/x - Step 3: Cross multiply
78.47x = 108.23 × 59.99 - Step 4: Simplify right side
78.47x = 6,492.33 - Step 5: Solve for x
x = 6,492.33/78.47 - Step 6: Final answer
x = 82.74
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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.