Home / 90,221.85-135,331.22-31,056.21

Finding the Fourth Proportional to 90,221.85, 135,331.22 and 31,056.21

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Solution

The fourth proportional to 90,221.85, 135,331.22 and 31,056.21 is: 46,583.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    90,221.85 : 135,331.22 = 31,056.21 : x
  2. Step 2: Convert to fraction form
    90,221.85/135,331.22 = 31,056.21/x
  3. Step 3: Cross multiply
    90,221.85x = 135,331.22 × 31,056.21
  4. Step 4: Simplify right side
    90,221.85x = 4,202,874,865.52
  5. Step 5: Solve for x
    x = 4,202,874,865.52/90,221.85
  6. Step 6: Final answer
    x = 46,583.78

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Double scale
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Similar ratio
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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.