Finding the Fourth Proportional to 128,719,117.80, 193,078,676.70 and 128,719,117.80
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Solution
The fourth proportional to 128,719,117.80, 193,078,676.70 and 128,719,117.80 is: 193,078,676.70
Step by Step Solution
- Step 1: Write the proportion equation
128,719,117.80 : 193,078,676.70 = 128,719,117.80 : x - Step 2: Convert to fraction form
128,719,117.80/193,078,676.70 = 128,719,117.80/x - Step 3: Cross multiply
128,719,117.80x = 193,078,676.70 × 128,719,117.80 - Step 4: Simplify right side
128,719,117.80x = 24,852,916,930,815,412 - Step 5: Solve for x
x = 24,852,916,930,815,412/128,719,117.80 - Step 6: Final answer
x = 193,078,676.70
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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.