Finding the Fourth Proportional to 87,189.47, 120,290.49 and 56,992.20
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Solution
The fourth proportional to 87,189.47, 120,290.49 and 56,992.20 is: 78,628.99
Step by Step Solution
- Step 1: Write the proportion equation
87,189.47 : 120,290.49 = 56,992.20 : x - Step 2: Convert to fraction form
87,189.47/120,290.49 = 56,992.20/x - Step 3: Cross multiply
87,189.47x = 120,290.49 × 56,992.20 - Step 4: Simplify right side
87,189.47x = 6,855,619,664.18 - Step 5: Solve for x
x = 6,855,619,664.18/87,189.47 - Step 6: Final answer
x = 78,628.99
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1.5x scale
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.