Finding the Fourth Proportional to 59.42, 81.90 and 47.12
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Solution
The fourth proportional to 59.42, 81.90 and 47.12 is: 64.95
Step by Step Solution
- Step 1: Write the proportion equation
59.42 : 81.90 = 47.12 : x - Step 2: Convert to fraction form
59.42/81.90 = 47.12/x - Step 3: Cross multiply
59.42x = 81.90 × 47.12 - Step 4: Simplify right side
59.42x = 3,859.13 - Step 5: Solve for x
x = 3,859.13/59.42 - Step 6: Final answer
x = 64.95
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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.