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Finding the Fourth Proportional to 68,635.80, 102,905.10 and 26,499.60

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Solution

The fourth proportional to 68,635.80, 102,905.10 and 26,499.60 is: 39,730.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    68,635.80 : 102,905.10 = 26,499.60 : x
  2. Step 2: Convert to fraction form
    68,635.80/102,905.10 = 26,499.60/x
  3. Step 3: Cross multiply
    68,635.80x = 102,905.10 × 26,499.60
  4. Step 4: Simplify right side
    68,635.80x = 2,726,943,987.96
  5. Step 5: Solve for x
    x = 2,726,943,987.96/68,635.80
  6. Step 6: Final answer
    x = 39,730.64

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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.