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Finding the Fourth Proportional to 68,780.60, 103,179.36 and 26,661.40

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Solution

The fourth proportional to 68,780.60, 103,179.36 and 26,661.40 is: 39,995.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    68,780.60 : 103,179.36 = 26,661.40 : x
  2. Step 2: Convert to fraction form
    68,780.60/103,179.36 = 26,661.40/x
  3. Step 3: Cross multiply
    68,780.60x = 103,179.36 × 26,661.40
  4. Step 4: Simplify right side
    68,780.60x = 2,750,906,188.70
  5. Step 5: Solve for x
    x = 2,750,906,188.70/68,780.60
  6. Step 6: Final answer
    x = 39,995.38

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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.