Home / 90,564.30-135,908.74-31,399.97

Finding the Fourth Proportional to 90,564.30, 135,908.74 and 31,399.97

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Solution

The fourth proportional to 90,564.30, 135,908.74 and 31,399.97 is: 47,121.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    90,564.30 : 135,908.74 = 31,399.97 : x
  2. Step 2: Convert to fraction form
    90,564.30/135,908.74 = 31,399.97/x
  3. Step 3: Cross multiply
    90,564.30x = 135,908.74 × 31,399.97
  4. Step 4: Simplify right side
    90,564.30x = 4,267,530,358.74
  5. Step 5: Solve for x
    x = 4,267,530,358.74/90,564.30
  6. Step 6: Final answer
    x = 47,121.55

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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.