Finding the Fourth Proportional to 7,971,664,420.80, 11,957,496,631.20 and 5,905,421,812.80
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Solution
The fourth proportional to 7,971,664,420.80, 11,957,496,631.20 and 5,905,421,812.80 is: 8,858,132,719.20
Step by Step Solution
- Step 1: Write the proportion equation
7,971,664,420.80 : 11,957,496,631.20 = 5,905,421,812.80 : x - Step 2: Convert to fraction form
7,971,664,420.80/11,957,496,631.20 = 5,905,421,812.80/x - Step 3: Cross multiply
7,971,664,420.80x = 11,957,496,631.20 × 5,905,421,812.80 - Step 4: Simplify right side
7,971,664,420.80x = 70,614,061,432,371,003,392 - Step 5: Solve for x
x = 70,614,061,432,371,003,392/7,971,664,420.80 - Step 6: Final answer
x = 8,858,132,719.20
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Double scale
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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.