Finding the Fourth Proportional to 128,203,152.79, 176,920,507.19 and 69,465,771.59
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Solution
The fourth proportional to 128,203,152.79, 176,920,507.19 and 69,465,771.59 is: 95,862,849.50
Step by Step Solution
- Step 1: Write the proportion equation
128,203,152.79 : 176,920,507.19 = 69,465,771.59 : x - Step 2: Convert to fraction form
128,203,152.79/176,920,507.19 = 69,465,771.59/x - Step 3: Cross multiply
128,203,152.79x = 176,920,507.19 × 69,465,771.59 - Step 4: Simplify right side
128,203,152.79x = 12,289,919,541,336,554 - Step 5: Solve for x
x = 12,289,919,541,336,554/128,203,152.79 - Step 6: Final answer
x = 95,862,849.50
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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.