Home / 90,321.57-135,408.51-34,129.85

Finding the Fourth Proportional to 90,321.57, 135,408.51 and 34,129.85

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Solution

The fourth proportional to 90,321.57, 135,408.51 and 34,129.85 is: 51,166.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    90,321.57 : 135,408.51 = 34,129.85 : x
  2. Step 2: Convert to fraction form
    90,321.57/135,408.51 = 34,129.85/x
  3. Step 3: Cross multiply
    90,321.57x = 135,408.51 × 34,129.85
  4. Step 4: Simplify right side
    90,321.57x = 4,621,471,457.98
  5. Step 5: Solve for x
    x = 4,621,471,457.98/90,321.57
  6. Step 6: Final answer
    x = 51,166.86

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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.