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Finding the Fourth Proportional to 76,803.92, 115,215.09 and 72,604.88

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Solution

The fourth proportional to 76,803.92, 115,215.09 and 72,604.88 is: 108,916.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    76,803.92 : 115,215.09 = 72,604.88 : x
  2. Step 2: Convert to fraction form
    76,803.92/115,215.09 = 72,604.88/x
  3. Step 3: Cross multiply
    76,803.92x = 115,215.09 × 72,604.88
  4. Step 4: Simplify right side
    76,803.92x = 8,365,177,783.64
  5. Step 5: Solve for x
    x = 8,365,177,783.64/76,803.92
  6. Step 6: Final answer
    x = 108,916.03

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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.