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Finding the Fourth Proportional to 134,450.70, 201,676.05 and 90,213.90

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Solution

The fourth proportional to 134,450.70, 201,676.05 and 90,213.90 is: 135,320.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    134,450.70 : 201,676.05 = 90,213.90 : x
  2. Step 2: Convert to fraction form
    134,450.70/201,676.05 = 90,213.90/x
  3. Step 3: Cross multiply
    134,450.70x = 201,676.05 × 90,213.90
  4. Step 4: Simplify right side
    134,450.70x = 18,193,983,007.10
  5. Step 5: Solve for x
    x = 18,193,983,007.10/134,450.70
  6. Step 6: Final answer
    x = 135,320.85

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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.