Home / 90,321.03-135,431.78-31,107.87

Finding the Fourth Proportional to 90,321.03, 135,431.78 and 31,107.87

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Solution

The fourth proportional to 90,321.03, 135,431.78 and 31,107.87 is: 46,644.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    90,321.03 : 135,431.78 = 31,107.87 : x
  2. Step 2: Convert to fraction form
    90,321.03/135,431.78 = 31,107.87/x
  3. Step 3: Cross multiply
    90,321.03x = 135,431.78 × 31,107.87
  4. Step 4: Simplify right side
    90,321.03x = 4,212,994,050.57
  5. Step 5: Solve for x
    x = 4,212,994,050.57/90,321.03
  6. Step 6: Final answer
    x = 46,644.66

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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.