Finding the Fourth Proportional to 143,492,890.80, 215,239,336.20 and 129,888,001.20
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Solution
The fourth proportional to 143,492,890.80, 215,239,336.20 and 129,888,001.20 is: 194,832,001.80
Step by Step Solution
- Step 1: Write the proportion equation
143,492,890.80 : 215,239,336.20 = 129,888,001.20 : x - Step 2: Convert to fraction form
143,492,890.80/215,239,336.20 = 129,888,001.20/x - Step 3: Cross multiply
143,492,890.80x = 215,239,336.20 × 129,888,001.20 - Step 4: Simplify right side
143,492,890.80x = 27,957,007,158,632,804 - Step 5: Solve for x
x = 27,957,007,158,632,804/143,492,890.80 - Step 6: Final answer
x = 194,832,001.80
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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.