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Finding the Fourth Proportional to 76,819.50, 115,229.25 and 18,451.50

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Solution

The fourth proportional to 76,819.50, 115,229.25 and 18,451.50 is: 27,677.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    76,819.50 : 115,229.25 = 18,451.50 : x
  2. Step 2: Convert to fraction form
    76,819.50/115,229.25 = 18,451.50/x
  3. Step 3: Cross multiply
    76,819.50x = 115,229.25 × 18,451.50
  4. Step 4: Simplify right side
    76,819.50x = 2,126,152,506.38
  5. Step 5: Solve for x
    x = 2,126,152,506.38/76,819.50
  6. Step 6: Final answer
    x = 27,677.25

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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.