Finding the Fourth Proportional to 420,829,038.90, 631,243,558.35 and 129,670,229.70
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Solution
The fourth proportional to 420,829,038.90, 631,243,558.35 and 129,670,229.70 is: 194,505,344.55
Step by Step Solution
- Step 1: Write the proportion equation
420,829,038.90 : 631,243,558.35 = 129,670,229.70 : x - Step 2: Convert to fraction form
420,829,038.90/631,243,558.35 = 129,670,229.70/x - Step 3: Cross multiply
420,829,038.90x = 631,243,558.35 × 129,670,229.70 - Step 4: Simplify right side
420,829,038.90x = 81,853,497,207,889,856 - Step 5: Solve for x
x = 81,853,497,207,889,856/420,829,038.90 - Step 6: Final answer
x = 194,505,344.55
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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.