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Finding the Fourth Proportional to 90,630, 125,072.91 and 50,346.82

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Solution

The fourth proportional to 90,630, 125,072.91 and 50,346.82 is: 69,480.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    90,630 : 125,072.91 = 50,346.82 : x
  2. Step 2: Convert to fraction form
    90,630/125,072.91 = 50,346.82/x
  3. Step 3: Cross multiply
    90,630x = 125,072.91 × 50,346.82
  4. Step 4: Simplify right side
    90,630x = 6,297,023,286.65
  5. Step 5: Solve for x
    x = 6,297,023,286.65/90,630
  6. Step 6: Final answer
    x = 69,480.56

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.