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Finding the Fourth Proportional to 90,631, 125,074.29 and 50,347.82

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Solution

The fourth proportional to 90,631, 125,074.29 and 50,347.82 is: 69,481.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    90,631 : 125,074.29 = 50,347.82 : x
  2. Step 2: Convert to fraction form
    90,631/125,074.29 = 50,347.82/x
  3. Step 3: Cross multiply
    90,631x = 125,074.29 × 50,347.82
  4. Step 4: Simplify right side
    90,631x = 6,297,217,839.55
  5. Step 5: Solve for x
    x = 6,297,217,839.55/90,631
  6. Step 6: Final answer
    x = 69,481.94

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1.5x scale

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.