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Finding the Fourth Proportional to 90,171, 124,441.74 and 50,427

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Solution

The fourth proportional to 90,171, 124,441.74 and 50,427 is: 69,592.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    90,171 : 124,441.74 = 50,427 : x
  2. Step 2: Convert to fraction form
    90,171/124,441.74 = 50,427/x
  3. Step 3: Cross multiply
    90,171x = 124,441.74 × 50,427
  4. Step 4: Simplify right side
    90,171x = 6,275,223,622.98
  5. Step 5: Solve for x
    x = 6,275,223,622.98/90,171
  6. Step 6: Final answer
    x = 69,592.48

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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.