Finding the Fourth Proportional to 79,271.60, 109,391.52 and 47,421.68
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Solution
The fourth proportional to 79,271.60, 109,391.52 and 47,421.68 is: 65,439.95
Step by Step Solution
- Step 1: Write the proportion equation
79,271.60 : 109,391.52 = 47,421.68 : x - Step 2: Convert to fraction form
79,271.60/109,391.52 = 47,421.68/x - Step 3: Cross multiply
79,271.60x = 109,391.52 × 47,421.68 - Step 4: Simplify right side
79,271.60x = 5,187,529,656.15 - Step 5: Solve for x
x = 5,187,529,656.15/79,271.60 - Step 6: Final answer
x = 65,439.95
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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.