Finding the Fourth Proportional to 91,728,138.90, 137,592,208.35 and 84,713,117.70
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Solution
The fourth proportional to 91,728,138.90, 137,592,208.35 and 84,713,117.70 is: 127,069,676.55
Step by Step Solution
- Step 1: Write the proportion equation
91,728,138.90 : 137,592,208.35 = 84,713,117.70 : x - Step 2: Convert to fraction form
91,728,138.90/137,592,208.35 = 84,713,117.70/x - Step 3: Cross multiply
91,728,138.90x = 137,592,208.35 × 84,713,117.70 - Step 4: Simplify right side
91,728,138.90x = 11,655,864,940,556,472 - Step 5: Solve for x
x = 11,655,864,940,556,472/91,728,138.90 - Step 6: Final answer
x = 127,069,676.55
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Double scale
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Similar ratio
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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.