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Finding the Fourth Proportional to 239,896.50, 331,086.36 and 139,294.50

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Solution

The fourth proportional to 239,896.50, 331,086.36 and 139,294.50 is: 192,243.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    239,896.50 : 331,086.36 = 139,294.50 : x
  2. Step 2: Convert to fraction form
    239,896.50/331,086.36 = 139,294.50/x
  3. Step 3: Cross multiply
    239,896.50x = 331,086.36 × 139,294.50
  4. Step 4: Simplify right side
    239,896.50x = 46,118,508,973.02
  5. Step 5: Solve for x
    x = 46,118,508,973.02/239,896.50
  6. Step 6: Final answer
    x = 192,243.36

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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.