Finding the Fourth Proportional to 81,269,905.80, 122,103,924.30 and 61,114,513.80
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Solution
The fourth proportional to 81,269,905.80, 122,103,924.30 and 61,114,513.80 is: 91,821,466.92
Step by Step Solution
- Step 1: Write the proportion equation
81,269,905.80 : 122,103,924.30 = 61,114,513.80 : x - Step 2: Convert to fraction form
81,269,905.80/122,103,924.30 = 61,114,513.80/x - Step 3: Cross multiply
81,269,905.80x = 122,103,924.30 × 61,114,513.80 - Step 4: Simplify right side
81,269,905.80x = 7,462,321,966,666,505 - Step 5: Solve for x
x = 7,462,321,966,666,505/81,269,905.80 - Step 6: Final answer
x = 91,821,466.92
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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.