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Finding the Fourth Proportional to 68,673.20, 103,009.80 and 29,231.60

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Solution

The fourth proportional to 68,673.20, 103,009.80 and 29,231.60 is: 43,847.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    68,673.20 : 103,009.80 = 29,231.60 : x
  2. Step 2: Convert to fraction form
    68,673.20/103,009.80 = 29,231.60/x
  3. Step 3: Cross multiply
    68,673.20x = 103,009.80 × 29,231.60
  4. Step 4: Simplify right side
    68,673.20x = 3,011,141,269.68
  5. Step 5: Solve for x
    x = 3,011,141,269.68/68,673.20
  6. Step 6: Final answer
    x = 43,847.40

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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.