Finding the Fourth Proportional to 79,670.91, 109,931.88 and 47,840.49
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Solution
The fourth proportional to 79,670.91, 109,931.88 and 47,840.49 is: 66,011.49
Step by Step Solution
- Step 1: Write the proportion equation
79,670.91 : 109,931.88 = 47,840.49 : x - Step 2: Convert to fraction form
79,670.91/109,931.88 = 47,840.49/x - Step 3: Cross multiply
79,670.91x = 109,931.88 × 47,840.49 - Step 4: Simplify right side
79,670.91x = 5,259,195,185.22 - Step 5: Solve for x
x = 5,259,195,185.22/79,670.91 - Step 6: Final answer
x = 66,011.49
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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.