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Finding the Fourth Proportional to 67,676.76, 101,515.14 and 20,928.60

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Solution

The fourth proportional to 67,676.76, 101,515.14 and 20,928.60 is: 31,392.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    67,676.76 : 101,515.14 = 20,928.60 : x
  2. Step 2: Convert to fraction form
    67,676.76/101,515.14 = 20,928.60/x
  3. Step 3: Cross multiply
    67,676.76x = 101,515.14 × 20,928.60
  4. Step 4: Simplify right side
    67,676.76x = 2,124,569,759.00
  5. Step 5: Solve for x
    x = 2,124,569,759.00/67,676.76
  6. Step 6: Final answer
    x = 31,392.90

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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.