Finding the Fourth Proportional to 120,291.64, 180,455.68 and 87,260.95
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Solution
The fourth proportional to 120,291.64, 180,455.68 and 87,260.95 is: 130,904.64
Step by Step Solution
- Step 1: Write the proportion equation
120,291.64 : 180,455.68 = 87,260.95 : x - Step 2: Convert to fraction form
120,291.64/180,455.68 = 87,260.95/x - Step 3: Cross multiply
120,291.64x = 180,455.68 × 87,260.95 - Step 4: Simplify right side
120,291.64x = 15,746,734,069.70 - Step 5: Solve for x
x = 15,746,734,069.70/120,291.64 - Step 6: Final answer
x = 130,904.64
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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.