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Finding the Fourth Proportional to 139,020.30, 191,799.90 and 82,449.90

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Solution

The fourth proportional to 139,020.30, 191,799.90 and 82,449.90 is: 113,752.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,020.30 : 191,799.90 = 82,449.90 : x
  2. Step 2: Convert to fraction form
    139,020.30/191,799.90 = 82,449.90/x
  3. Step 3: Cross multiply
    139,020.30x = 191,799.90 × 82,449.90
  4. Step 4: Simplify right side
    139,020.30x = 15,813,882,575.01
  5. Step 5: Solve for x
    x = 15,813,882,575.01/139,020.30
  6. Step 6: Final answer
    x = 113,752.33

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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.