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Finding the Fourth Proportional to 89,912.40, 134,868.60 and 82,330.80

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Solution

The fourth proportional to 89,912.40, 134,868.60 and 82,330.80 is: 123,496.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    89,912.40 : 134,868.60 = 82,330.80 : x
  2. Step 2: Convert to fraction form
    89,912.40/134,868.60 = 82,330.80/x
  3. Step 3: Cross multiply
    89,912.40x = 134,868.60 × 82,330.80
  4. Step 4: Simplify right side
    89,912.40x = 11,103,839,732.88
  5. Step 5: Solve for x
    x = 11,103,839,732.88/89,912.40
  6. Step 6: Final answer
    x = 123,496.20

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.