Finding the Fourth Proportional to 99,143.74, 136,871.68 and 76,432.96
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Solution
The fourth proportional to 99,143.74, 136,871.68 and 76,432.96 is: 105,518.59
Step by Step Solution
- Step 1: Write the proportion equation
99,143.74 : 136,871.68 = 76,432.96 : x - Step 2: Convert to fraction form
99,143.74/136,871.68 = 76,432.96/x - Step 3: Cross multiply
99,143.74x = 136,871.68 × 76,432.96 - Step 4: Simplify right side
99,143.74x = 10,461,507,642.57 - Step 5: Solve for x
x = 10,461,507,642.57/99,143.74 - Step 6: Final answer
x = 105,518.59
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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.