Finding the Fourth Proportional to 105,517.30, 145,612.95 and 57,118.99
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Solution
The fourth proportional to 105,517.30, 145,612.95 and 57,118.99 is: 78,823.71
Step by Step Solution
- Step 1: Write the proportion equation
105,517.30 : 145,612.95 = 57,118.99 : x - Step 2: Convert to fraction form
105,517.30/145,612.95 = 57,118.99/x - Step 3: Cross multiply
105,517.30x = 145,612.95 × 57,118.99 - Step 4: Simplify right side
105,517.30x = 8,317,264,634.92 - Step 5: Solve for x
x = 8,317,264,634.92/105,517.30 - Step 6: Final answer
x = 78,823.71
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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.