Home / 90,416.96-135,581.70-31,231.88

Finding the Fourth Proportional to 90,416.96, 135,581.70 and 31,231.88

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Solution

The fourth proportional to 90,416.96, 135,581.70 and 31,231.88 is: 46,832.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    90,416.96 : 135,581.70 = 31,231.88 : x
  2. Step 2: Convert to fraction form
    90,416.96/135,581.70 = 31,231.88/x
  3. Step 3: Cross multiply
    90,416.96x = 135,581.70 × 31,231.88
  4. Step 4: Simplify right side
    90,416.96x = 4,234,471,384.60
  5. Step 5: Solve for x
    x = 4,234,471,384.60/90,416.96
  6. Step 6: Final answer
    x = 46,832.71

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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.