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Finding the Fourth Proportional to 139,021.30, 191,801.28 and 82,450.90

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Solution

The fourth proportional to 139,021.30, 191,801.28 and 82,450.90 is: 113,753.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,021.30 : 191,801.28 = 82,450.90 : x
  2. Step 2: Convert to fraction form
    139,021.30/191,801.28 = 82,450.90/x
  3. Step 3: Cross multiply
    139,021.30x = 191,801.28 × 82,450.90
  4. Step 4: Simplify right side
    139,021.30x = 15,814,188,157.15
  5. Step 5: Solve for x
    x = 15,814,188,157.15/139,021.30
  6. Step 6: Final answer
    x = 113,753.71

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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.