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Finding the Fourth Proportional to 71,228.30, 106,839.47 and 18,636.62

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Solution

The fourth proportional to 71,228.30, 106,839.47 and 18,636.62 is: 27,954.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,228.30 : 106,839.47 = 18,636.62 : x
  2. Step 2: Convert to fraction form
    71,228.30/106,839.47 = 18,636.62/x
  3. Step 3: Cross multiply
    71,228.30x = 106,839.47 × 18,636.62
  4. Step 4: Simplify right side
    71,228.30x = 1,991,126,115.79
  5. Step 5: Solve for x
    x = 1,991,126,115.79/71,228.30
  6. Step 6: Final answer
    x = 27,954.15

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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.