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Finding the Fourth Proportional to 69,217.80, 103,826.70 and 68,780.40

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Solution

The fourth proportional to 69,217.80, 103,826.70 and 68,780.40 is: 103,170.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    69,217.80 : 103,826.70 = 68,780.40 : x
  2. Step 2: Convert to fraction form
    69,217.80/103,826.70 = 68,780.40/x
  3. Step 3: Cross multiply
    69,217.80x = 103,826.70 × 68,780.40
  4. Step 4: Simplify right side
    69,217.80x = 7,141,241,956.68
  5. Step 5: Solve for x
    x = 7,141,241,956.68/69,217.80
  6. Step 6: Final answer
    x = 103,170.60

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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.