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Finding the Fourth Proportional to 139,849.20, 209,773.80 and 40,015.35

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Solution

The fourth proportional to 139,849.20, 209,773.80 and 40,015.35 is: 60,023.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,849.20 : 209,773.80 = 40,015.35 : x
  2. Step 2: Convert to fraction form
    139,849.20/209,773.80 = 40,015.35/x
  3. Step 3: Cross multiply
    139,849.20x = 209,773.80 × 40,015.35
  4. Step 4: Simplify right side
    139,849.20x = 8,394,172,027.83
  5. Step 5: Solve for x
    x = 8,394,172,027.83/139,849.20
  6. Step 6: Final answer
    x = 60,023.03

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.