Finding the Fourth Proportional to 78,384.38, 108,170.75 and 42,574.99
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Solution
The fourth proportional to 78,384.38, 108,170.75 and 42,574.99 is: 58,753.65
Step by Step Solution
- Step 1: Write the proportion equation
78,384.38 : 108,170.75 = 42,574.99 : x - Step 2: Convert to fraction form
78,384.38/108,170.75 = 42,574.99/x - Step 3: Cross multiply
78,384.38x = 108,170.75 × 42,574.99 - Step 4: Simplify right side
78,384.38x = 4,605,368,435.55 - Step 5: Solve for x
x = 4,605,368,435.55/78,384.38 - Step 6: Final answer
x = 58,753.65
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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.