Finding the Fourth Proportional to 83,787.12, 125,740.65 and 30,478.99
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Solution
The fourth proportional to 83,787.12, 125,740.65 and 30,478.99 is: 45,740.30
Step by Step Solution
- Step 1: Write the proportion equation
83,787.12 : 125,740.65 = 30,478.99 : x - Step 2: Convert to fraction form
83,787.12/125,740.65 = 30,478.99/x - Step 3: Cross multiply
83,787.12x = 125,740.65 × 30,478.99 - Step 4: Simplify right side
83,787.12x = 3,832,448,013.94 - Step 5: Solve for x
x = 3,832,448,013.94/83,787.12 - Step 6: Final answer
x = 45,740.30
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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.