Finding the Fourth Proportional to 86,206,911.30, 129,310,366.95 and 76,853,549.70
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Solution
The fourth proportional to 86,206,911.30, 129,310,366.95 and 76,853,549.70 is: 115,280,324.55
Step by Step Solution
- Step 1: Write the proportion equation
86,206,911.30 : 129,310,366.95 = 76,853,549.70 : x - Step 2: Convert to fraction form
86,206,911.30/129,310,366.95 = 76,853,549.70/x - Step 3: Cross multiply
86,206,911.30x = 129,310,366.95 × 76,853,549.70 - Step 4: Simplify right side
86,206,911.30x = 9,937,960,713,117,064 - Step 5: Solve for x
x = 9,937,960,713,117,064/86,206,911.30 - Step 6: Final answer
x = 115,280,324.55
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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.