Finding the Fourth Proportional to 99,760.13, 137,671.99 and 56,745.80
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Solution
The fourth proportional to 99,760.13, 137,671.99 and 56,745.80 is: 78,310.92
Step by Step Solution
- Step 1: Write the proportion equation
99,760.13 : 137,671.99 = 56,745.80 : x - Step 2: Convert to fraction form
99,760.13/137,671.99 = 56,745.80/x - Step 3: Cross multiply
99,760.13x = 137,671.99 × 56,745.80 - Step 4: Simplify right side
99,760.13x = 7,812,307,210.14 - Step 5: Solve for x
x = 7,812,307,210.14/99,760.13 - Step 6: Final answer
x = 78,310.92
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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.