Finding the Fourth Proportional to 99,149.74, 136,879.98 and 76,438.96
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Solution
The fourth proportional to 99,149.74, 136,879.98 and 76,438.96 is: 105,526.89
Step by Step Solution
- Step 1: Write the proportion equation
99,149.74 : 136,879.98 = 76,438.96 : x - Step 2: Convert to fraction form
99,149.74/136,879.98 = 76,438.96/x - Step 3: Cross multiply
99,149.74x = 136,879.98 × 76,438.96 - Step 4: Simplify right side
99,149.74x = 10,462,963,316.02 - Step 5: Solve for x
x = 10,462,963,316.02/99,149.74 - Step 6: Final answer
x = 105,526.89
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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.