Finding the Fourth Proportional to 129,120,007.80, 193,680,011.70 and 129,120,007.80
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Solution
The fourth proportional to 129,120,007.80, 193,680,011.70 and 129,120,007.80 is: 193,680,011.70
Step by Step Solution
- Step 1: Write the proportion equation
129,120,007.80 : 193,680,011.70 = 129,120,007.80 : x - Step 2: Convert to fraction form
129,120,007.80/193,680,011.70 = 129,120,007.80/x - Step 3: Cross multiply
129,120,007.80x = 193,680,011.70 × 129,120,007.80 - Step 4: Simplify right side
129,120,007.80x = 25,007,964,621,408,088 - Step 5: Solve for x
x = 25,007,964,621,408,088/129,120,007.80 - Step 6: Final answer
x = 193,680,011.70
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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.