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Finding the Fourth Proportional to 220,898.40, 331,347.60 and 71,138.40

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Solution

The fourth proportional to 220,898.40, 331,347.60 and 71,138.40 is: 106,707.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    220,898.40 : 331,347.60 = 71,138.40 : x
  2. Step 2: Convert to fraction form
    220,898.40/331,347.60 = 71,138.40/x
  3. Step 3: Cross multiply
    220,898.40x = 331,347.60 × 71,138.40
  4. Step 4: Simplify right side
    220,898.40x = 23,571,538,107.84
  5. Step 5: Solve for x
    x = 23,571,538,107.84/220,898.40
  6. Step 6: Final answer
    x = 106,707.60

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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.