Finding the Fourth Proportional to 83,877.12, 115,711.74 and 53,647.31
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Solution
The fourth proportional to 83,877.12, 115,711.74 and 53,647.31 is: 74,008.55
Step by Step Solution
- Step 1: Write the proportion equation
83,877.12 : 115,711.74 = 53,647.31 : x - Step 2: Convert to fraction form
83,877.12/115,711.74 = 53,647.31/x - Step 3: Cross multiply
83,877.12x = 115,711.74 × 53,647.31 - Step 4: Simplify right side
83,877.12x = 6,207,623,875.70 - Step 5: Solve for x
x = 6,207,623,875.70/83,877.12 - Step 6: Final answer
x = 74,008.55
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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.