Home / 90,626.40-135,939.60-31,455.90

Finding the Fourth Proportional to 90,626.40, 135,939.60 and 31,455.90

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Solution

The fourth proportional to 90,626.40, 135,939.60 and 31,455.90 is: 47,183.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    90,626.40 : 135,939.60 = 31,455.90 : x
  2. Step 2: Convert to fraction form
    90,626.40/135,939.60 = 31,455.90/x
  3. Step 3: Cross multiply
    90,626.40x = 135,939.60 × 31,455.90
  4. Step 4: Simplify right side
    90,626.40x = 4,276,102,463.64
  5. Step 5: Solve for x
    x = 4,276,102,463.64/90,626.40
  6. Step 6: Final answer
    x = 47,183.85

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1.5x scale

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.