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Finding the Fourth Proportional to 139,355.44, 209,018.92 and 38,162.49

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Solution

The fourth proportional to 139,355.44, 209,018.92 and 38,162.49 is: 57,239.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,355.44 : 209,018.92 = 38,162.49 : x
  2. Step 2: Convert to fraction form
    139,355.44/209,018.92 = 38,162.49/x
  3. Step 3: Cross multiply
    139,355.44x = 209,018.92 × 38,162.49
  4. Step 4: Simplify right side
    139,355.44x = 7,976,682,444.31
  5. Step 5: Solve for x
    x = 7,976,682,444.31/139,355.44
  6. Step 6: Final answer
    x = 57,239.84

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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.