Finding the Fourth Proportional to 92,489.80, 138,540.30 and 76,937.80
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Solution
The fourth proportional to 92,489.80, 138,540.30 and 76,937.80 is: 115,244.99
Step by Step Solution
- Step 1: Write the proportion equation
92,489.80 : 138,540.30 = 76,937.80 : x - Step 2: Convert to fraction form
92,489.80/138,540.30 = 76,937.80/x - Step 3: Cross multiply
92,489.80x = 138,540.30 × 76,937.80 - Step 4: Simplify right side
92,489.80x = 10,658,985,893.34 - Step 5: Solve for x
x = 10,658,985,893.34/92,489.80 - Step 6: Final answer
x = 115,244.99
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1.5x scale
Why These Related Problems?
These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.