Finding the Fourth Proportional to 128,221.46, 176,936.36 and 70,860.10
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Solution
The fourth proportional to 128,221.46, 176,936.36 and 70,860.10 is: 97,781.82
Step by Step Solution
- Step 1: Write the proportion equation
128,221.46 : 176,936.36 = 70,860.10 : x - Step 2: Convert to fraction form
128,221.46/176,936.36 = 70,860.10/x - Step 3: Cross multiply
128,221.46x = 176,936.36 × 70,860.10 - Step 4: Simplify right side
128,221.46x = 12,537,728,163.24 - Step 5: Solve for x
x = 12,537,728,163.24/128,221.46 - Step 6: Final answer
x = 97,781.82
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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.