Finding the Fourth Proportional to 79.26, 109.26 and 70.08
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Solution
The fourth proportional to 79.26, 109.26 and 70.08 is: 96.61
Step by Step Solution
- Step 1: Write the proportion equation
79.26 : 109.26 = 70.08 : x - Step 2: Convert to fraction form
79.26/109.26 = 70.08/x - Step 3: Cross multiply
79.26x = 109.26 × 70.08 - Step 4: Simplify right side
79.26x = 7,656.94 - Step 5: Solve for x
x = 7,656.94/79.26 - Step 6: Final answer
x = 96.61
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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.