Finding the Fourth Proportional to 78,349.07, 108,121.64 and 42,539.99
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Solution
The fourth proportional to 78,349.07, 108,121.64 and 42,539.99 is: 58,705.13
Step by Step Solution
- Step 1: Write the proportion equation
78,349.07 : 108,121.64 = 42,539.99 : x - Step 2: Convert to fraction form
78,349.07/108,121.64 = 42,539.99/x - Step 3: Cross multiply
78,349.07x = 108,121.64 × 42,539.99 - Step 4: Simplify right side
78,349.07x = 4,599,492,731.08 - Step 5: Solve for x
x = 4,599,492,731.08/78,349.07 - Step 6: Final answer
x = 58,705.13
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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.