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Finding the Fourth Proportional to 114,638.40, 171,698.40 and 67,982.40

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Solution

The fourth proportional to 114,638.40, 171,698.40 and 67,982.40 is: 101,819.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    114,638.40 : 171,698.40 = 67,982.40 : x
  2. Step 2: Convert to fraction form
    114,638.40/171,698.40 = 67,982.40/x
  3. Step 3: Cross multiply
    114,638.40x = 171,698.40 × 67,982.40
  4. Step 4: Simplify right side
    114,638.40x = 11,672,469,308.16
  5. Step 5: Solve for x
    x = 11,672,469,308.16/114,638.40
  6. Step 6: Final answer
    x = 101,819.89

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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.