Finding the Fourth Proportional to 85,508,059.58, 128,260,292.39 and 20,812,225.58
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Solution
The fourth proportional to 85,508,059.58, 128,260,292.39 and 20,812,225.58 is: 31,217,900.99
Step by Step Solution
- Step 1: Write the proportion equation
85,508,059.58 : 128,260,292.39 = 20,812,225.58 : x - Step 2: Convert to fraction form
85,508,059.58/128,260,292.39 = 20,812,225.58/x - Step 3: Cross multiply
85,508,059.58x = 128,260,292.39 × 20,812,225.58 - Step 4: Simplify right side
85,508,059.58x = 2,669,382,138,073,376 - Step 5: Solve for x
x = 2,669,382,138,073,376/85,508,059.58 - Step 6: Final answer
x = 31,217,900.99
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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.