Finding the Fourth Proportional to 420,829,046.40, 631,243,569.60 and 129,670,237.20
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Solution
The fourth proportional to 420,829,046.40, 631,243,569.60 and 129,670,237.20 is: 194,505,355.80
Step by Step Solution
- Step 1: Write the proportion equation
420,829,046.40 : 631,243,569.60 = 129,670,237.20 : x - Step 2: Convert to fraction form
420,829,046.40/631,243,569.60 = 129,670,237.20/x - Step 3: Cross multiply
420,829,046.40x = 631,243,569.60 × 129,670,237.20 - Step 4: Simplify right side
420,829,046.40x = 81,853,503,401,006,720 - Step 5: Solve for x
x = 81,853,503,401,006,720/420,829,046.40 - Step 6: Final answer
x = 194,505,355.80
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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.