Finding the Fourth Proportional to 318,873,887.20, 478,310,830.80 and 103,463,135.20
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Solution
The fourth proportional to 318,873,887.20, 478,310,830.80 and 103,463,135.20 is: 155,194,702.80
Step by Step Solution
- Step 1: Write the proportion equation
318,873,887.20 : 478,310,830.80 = 103,463,135.20 : x - Step 2: Convert to fraction form
318,873,887.20/478,310,830.80 = 103,463,135.20/x - Step 3: Cross multiply
318,873,887.20x = 478,310,830.80 × 103,463,135.20 - Step 4: Simplify right side
318,873,887.20x = 49,487,538,154,684,728 - Step 5: Solve for x
x = 49,487,538,154,684,728/318,873,887.20 - Step 6: Final answer
x = 155,194,702.80
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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.