Finding the Fourth Proportional to 74.36, 102.55 and 58.80
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Solution
The fourth proportional to 74.36, 102.55 and 58.80 is: 81.08
Step by Step Solution
- Step 1: Write the proportion equation
74.36 : 102.55 = 58.80 : x - Step 2: Convert to fraction form
74.36/102.55 = 58.80/x - Step 3: Cross multiply
74.36x = 102.55 × 58.80 - Step 4: Simplify right side
74.36x = 6,029.13 - Step 5: Solve for x
x = 6,029.13/74.36 - Step 6: Final answer
x = 81.08
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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.