Finding the Fourth Proportional to 143,781.30, 198,418.99 and 83,387.75
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Solution
The fourth proportional to 143,781.30, 198,418.99 and 83,387.75 is: 115,075.56
Step by Step Solution
- Step 1: Write the proportion equation
143,781.30 : 198,418.99 = 83,387.75 : x - Step 2: Convert to fraction form
143,781.30/198,418.99 = 83,387.75/x - Step 3: Cross multiply
143,781.30x = 198,418.99 × 83,387.75 - Step 4: Simplify right side
143,781.30x = 16,545,713,420.95 - Step 5: Solve for x
x = 16,545,713,420.95/143,781.30 - Step 6: Final answer
x = 115,075.56
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Why These Related Problems?
These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.