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Finding the Fourth Proportional to 89,129.40, 133,694.10 and 71,633.40

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Solution

The fourth proportional to 89,129.40, 133,694.10 and 71,633.40 is: 107,450.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    89,129.40 : 133,694.10 = 71,633.40 : x
  2. Step 2: Convert to fraction form
    89,129.40/133,694.10 = 71,633.40/x
  3. Step 3: Cross multiply
    89,129.40x = 133,694.10 × 71,633.40
  4. Step 4: Simplify right side
    89,129.40x = 9,576,962,942.94
  5. Step 5: Solve for x
    x = 9,576,962,942.94/89,129.40
  6. Step 6: Final answer
    x = 107,450.10

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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.