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Finding the Fourth Proportional to 84,305.44, 126,481.20 and 28,905.76

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Solution

The fourth proportional to 84,305.44, 126,481.20 and 28,905.76 is: 43,366.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    84,305.44 : 126,481.20 = 28,905.76 : x
  2. Step 2: Convert to fraction form
    84,305.44/126,481.20 = 28,905.76/x
  3. Step 3: Cross multiply
    84,305.44x = 126,481.20 × 28,905.76
  4. Step 4: Simplify right side
    84,305.44x = 3,656,035,211.71
  5. Step 5: Solve for x
    x = 3,656,035,211.71/84,305.44
  6. Step 6: Final answer
    x = 43,366.54

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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.