Finding the Fourth Proportional to 420,723,713.68, 631,153,383.96 and 129,590,701.12
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Solution
The fourth proportional to 420,723,713.68, 631,153,383.96 and 129,590,701.12 is: 194,406,939.48
Step by Step Solution
- Step 1: Write the proportion equation
420,723,713.68 : 631,153,383.96 = 129,590,701.12 : x - Step 2: Convert to fraction form
420,723,713.68/631,153,383.96 = 129,590,701.12/x - Step 3: Cross multiply
420,723,713.68x = 631,153,383.96 × 129,590,701.12 - Step 4: Simplify right side
420,723,713.68x = 81,791,609,541,636,976 - Step 5: Solve for x
x = 81,791,609,541,636,976/420,723,713.68 - Step 6: Final answer
x = 194,406,939.48
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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.