Finding the Fourth Proportional to 93.98, 129.62 and 69.42
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Solution
The fourth proportional to 93.98, 129.62 and 69.42 is: 95.75
Step by Step Solution
- Step 1: Write the proportion equation
93.98 : 129.62 = 69.42 : x - Step 2: Convert to fraction form
93.98/129.62 = 69.42/x - Step 3: Cross multiply
93.98x = 129.62 × 69.42 - Step 4: Simplify right side
93.98x = 8,997.87 - Step 5: Solve for x
x = 8,997.87/93.98 - Step 6: Final answer
x = 95.75
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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.