Finding the Fourth Proportional to 99.98, 138.00 and 58.54
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Solution
The fourth proportional to 99.98, 138.00 and 58.54 is: 80.80
Step by Step Solution
- Step 1: Write the proportion equation
99.98 : 138.00 = 58.54 : x - Step 2: Convert to fraction form
99.98/138.00 = 58.54/x - Step 3: Cross multiply
99.98x = 138.00 × 58.54 - Step 4: Simplify right side
99.98x = 8,077.54 - Step 5: Solve for x
x = 8,077.54/99.98 - Step 6: Final answer
x = 80.80
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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.