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Finding the Fourth Proportional to 67,239.80, 100,842.89 and 19,845.48

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Solution

The fourth proportional to 67,239.80, 100,842.89 and 19,845.48 is: 29,763.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    67,239.80 : 100,842.89 = 19,845.48 : x
  2. Step 2: Convert to fraction form
    67,239.80/100,842.89 = 19,845.48/x
  3. Step 3: Cross multiply
    67,239.80x = 100,842.89 × 19,845.48
  4. Step 4: Simplify right side
    67,239.80x = 2,001,275,457.41
  5. Step 5: Solve for x
    x = 2,001,275,457.41/67,239.80
  6. Step 6: Final answer
    x = 29,763.26

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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.