Finding the Fourth Proportional to 129,310,430.20, 193,965,645.30 and 115,280,387.80
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Solution
The fourth proportional to 129,310,430.20, 193,965,645.30 and 115,280,387.80 is: 172,920,581.70
Step by Step Solution
- Step 1: Write the proportion equation
129,310,430.20 : 193,965,645.30 = 115,280,387.80 : x - Step 2: Convert to fraction form
129,310,430.20/193,965,645.30 = 115,280,387.80/x - Step 3: Cross multiply
129,310,430.20x = 193,965,645.30 × 115,280,387.80 - Step 4: Simplify right side
129,310,430.20x = 22,360,434,810,061,248 - Step 5: Solve for x
x = 22,360,434,810,061,248/129,310,430.20 - Step 6: Final answer
x = 172,920,581.70
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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.